1999 Sierra here, my no start issue was due to ignition switch not sending 12v to the pcm while in the crank position (but only when cold, never had an issue during the summer). I took it to an independent shop, who successfully diagnosed the problem. Shoutout to Denio Automotive in Phillipsburg, Ks! I had them bypass the issue, (instead of buying the correct but very expensive part) with a push button(leave the ign. sw. in the on position, then push the button to run the starter). This was after I had a dealership mechanic(on his own time at my house) replace the intake gasket, because he was "pretty sure" that's what's wrong, never did any other diagnoses. Then I replaced the crankshaft sensor, then the camshaft sensor. Hope this saves someone else some trouble.
Ty if it’s not my starter relay fuse I bet u have the answer to my problem. My truck 2001 gmc Sonoma SL is my work horse & im positive it’s not my starter. After a week no start like you but lights but no click, no noise , no start. Then I go out to check it out get in , turn the key & it turns over like nothing was ever wrong. Now I’m looking for loose ground to battery etc but nothing. Just replaced battery before 2 yr warranty I have had electrical problems but nothing unmanageable. I had one other car way back that I ended up hot wiring the fuse & installing a push button start on dash. Forgot all about it till I saw ur video. Great tip I’m sure to double check it. It’s started every time now but I feel better about knowing WTH ! Old Harley girl 👍
Mr Rabb. Sir you just saved my trucks life. I had watched every imaginable video and was to the point of settingy truck afire when I stumbled across it video. Thank you very much sir. My truck thanks you as well
I really needed to see this I thank you so much for this I’m doing it now to my 98 s10 and I couldn’t find the problem and here it is you solved it for me thanks a lot bro
Helps alot checking my s10 first thing in the morning! My starter tested good got new relays for the oem fusebox had it jump w the a screwdriver twice then nothing!!
Pretty Damn ingenious!! I don't know what us gumball heads would do with out guys like you. Not only do you spend your precious time trouble shooting these difficult issues, but you make it even more of a challenge to record it. You Rock! Keep giving knowledge; it's the one thing that we can't take back.
Thank you, trucks been dead 3 weeks while I swapped stuff out. While the jump didn't fix my issue, shoving the wire into the ground position of the relay did on my 2015 2500gas. That got it to turn over, shimming the ground on my fuel relay fired it the rest of the way off. Go figure 🤦🏻♂️
My 02 Suburban just started no crank no start a week ago with voltage meter under 12 when i turn key to on. A few months ago it did the same thing i cleaned the cable from starter, terminal and connection worked fine for 3 months hope its not a bigger issue this time. Build up of oil leak and road grime
Also and don’t get me wrong I love your solution it’s working that’s what counts right? Main Objective get ur vehicle to get you from point a to B right? Yet another thing that happens is the chip in key for some reason another fails to read. By the bcm again remove the power VIa rely. there’s a solution you got a find a video on here I’ve seen it. you can reprogram the chip in the key. by turning the key on and off on and off four times and waiting five seconds in between each step. just a couple little things that I come up with that you might check. Then get that wire off of it and go back the way it was. if you’re ever interested in just checking it out. Great video I liked I subscribed have a great day. .
@@clayallison3584 well that’s good to know that’s for sure that’s good to know I’m not above admitting when I don’t know something That’s a normal check that I go through before I go to an extreme
Good job, what I did was swap the fuse with the fuse ne to it and my 2005 started right up. Both fuses have the same ID numbers. I still have to buy new fuses..to replace the problem one.
There is a bad ground wire that's on the top of the engine. It's the pcm ground. Basically the fix is to ground it to the firewall. You instead did it at the relay. So myself I'd just keep doing what your doing. There are a few videos out there showing the actual wire wire location
Thanks for the comment! Hopefully it will help someone else. This is August 2022 and the push button is still working!! Unfortunately the truck has Michigan Cancer really bad…. RUST… so we’ll see how long she keeps going!!✌️
Well Todd, I'm having the exact problem, the exact problem on my 2006 Chevrolet Silverado 5.3 liter z71. I've been combing everything in and out of the fuse boxes for about 2 months. I still haven't figured it out. I'm going to look at the ignition switch now, turn the key, and the instrument panel lights up, turn key to start, and nothing happens. It's a good thing I'm retired and live alone. This is not frustrating at all; it's kind of fun.
Update!! Son just called and the push button no longer works... new battery and the Sierra is back in action!!! He doesn’t drive it much at college and the old battery needed to be replaced.
Im having the same issue with my truck. By any chance can you make a video on how you wired up the push button? I’m getting confused on the grounding part
@@jesusceja1572 watch the video at minute 3. I used a two pair wire and grounded on end to the ground on the firewall, ran both wires into the cab, wired up the push button, then ran the other wire (the one NOT connected to the firewall) back to the starter relay ground post. Hope that helps.
@@daniellelatham4015 messed w the pass lock system (if that’s the one w the padlock) no luck. FYI - NEVER had the padlock light on the dash. Hope it helps.
The key has to be turned to start to get fuel pump going. I’m having intermittent no crank , jump hot to solenoid with relay removed did work for a while. It appears that the connection between top of fuse box where relay would plug into and where the terminal blocks underneath are is bad .
Any time I encounter electrical issues with theses trucks and vans I start at engine compartment I take apart every ground strap every body ground I hit em with a file and put copper based dielectric grease on each end. Fixes at least 50 or 60 % of em .there are numerous body to frame grounds on these that are allergic to exposure to road grime. A key ground that I've found FROM BOdy to frame on outside of frame under driver door.
I plan to check those grounds this summer. I actually now have an ‘05 GMC that I think is having ground issues as well. I will clean up/fix the grounds on the frame near the driver side door and update. Thanks a bunch!!
@@toddrabb1892 this a huge problem with these gm vehicles I think the chassis, wires and connectors were made from Alka seltzer the way they corode and disolve. Need to clean existing grounds and add extra grounds for redundancy everywhere to keep these older vehicles from random monthly codes.
My fuel pump relay is rapidly clicking with key in the on position, I took relay out and got wired my fuel pump. It’s just turning over. Any help is appreciated, tia
Kinda did this to my 92 gmc. In addition spliced a hot wire to a start button and to the solenoid incase something popped in the OEM starter wiring. Nice job!
I have a 2000 yukon denali. I have no power to the starter relay. Everything else has power in the fuse box. I assume the wires going to the relay is bad?????
Great video 🤟🏽 I have similar issue ima try it out, only thing is I connect my OBD2 scanner tool and it reads no connection to ecu or connector broken so hopefully this can fix my issue
Hi Todd, guys, I did wire a on/off button, and every time the switch gets to on, it engages the starter, it doesn't matter how I wire that button, as long as the ground on the relay is "grounded", it engages the starter and won't turn off till I turn the key off, any ideas? Thanks I will appreciate it very much
My bad wasn’t getting notifications to the replies but I found the issue the pcm b kept blowing the fuse due to a bad fuel pump and by that fuse blowing the OBD reader wasn’t connecting
Hey there, so we got a 04 Sierra 4x4 and switched out the Neutral safety switch. What a pain in the ass.. so-After finally getting this thing on.. no crank over Long story short- Watched your video- Trying the fuse made the engine start but not officially crank all the way over Going to try the park neutral switch and see what’s up. This has been a nightmare. Any other suggestions would be HELPFUL. 4 days in. OMG! Is it a ECM? A TCM? After installing a new NSS, do we HAVE to reset anything . I’m about ready to back this bad boy into a lake … 😮
The wire your talking about that goes to the ECM is the signal wire for the relay. The ecm sends a ground signal to the relay which in turn closes contacts inside of the relay. Allowing the starter to crank over. Also you can just cross over the 12v constant pin out to the pin out going to starter. No need to run wire to battery. Either way good enough man
im.not receiving ground from the relay and when I test the port from the ignition switch I'm not getting a light when I turn the key. any idea what to check?
@@pablogomez7519 battery terminals and cables for corrosion first. Make sure it's making a good clean connection at battery on both sides. Check grounding straps real good next to engine block and to the frame and body.
@@robertkemp1587 I can turn on the truck with my power probe. I have a wire on the S terminal and that's how I start the truck. I can't find a schematic so I can see wich wire I use to follow for the ground issue
OK - same situation on my '05 GMC Sierra. Seems like an ecm signal or lack thereof. Getting ready to wired the bypas, i went ahead and pulled the ECM1 & ECM2 fuses, and replaced. Could hear an audible reset. Jump in started right up BUT with reduced engine power - pulled negative cable, reattached. Cleared dash and started right up. Still not sure what the underlying issue is RE: ECM signal.
Good evening from Texas! K U D O S !!!! on your video. Very informative. I have the same problem with my 2007 Silverado 4.8 engine. No crank no start! Changed the acceralate pedal and throttle body. It started for several cranks but let it rest for awhile. Later it wouldn't start at all! Reset codes and added additional grounds (hood), clean all grounds and it cranked but no start. I tried it again but no crank. My last resort is to check all fuses and relay. Any suggestions? Shall wait for your response.
Had the same issue. Your ECM is toast. ECM is seeing the signal to start (evidenced by the fact that the truck will not start unless you turn the key to start position) but is not triggering the starter relay.
I was relearning tpms on 09 Silverado and half way through everything shit off acts as if battery is dead but all dash light come n stereo comes on lightbar etc just won’t crank or turn over any one have a suggestion on what it could be maybe anti theft mode
You could have just jumped 87 to 30 on the relay locations on the block. No need to run it all the way to the battery but this way works too. If you are driving you did it right... 😂. I'm in MI too. I feel your pain with rust
I have replaced every damn thing in my 2002 avalanche and tried all these tricks nothing works, bought a new brain still nothing I did the 3 10 min resets 20 times security lights off still wont work please help, my trucks been down 6 months noone can figure it out
Which wire from ground at fuse box? I’m guessing run ground from post to body then ground in cab to switch on one terminal then other terminal grounded?
I did this a month ago. Push button start. No problems. I have an 06 Silverado 5.3. No codes. No security issues. Before and after the bypass. As far as the problem is concerned. It can be only 1 of 2 things. That ground to the ECM is broken or loose or the ECM is bad even thou there are no codes on the scanner.
I have a 2005 Silverado with the same issues. I replaced the ECM/PCM and the BCM and it started like it should for 10 days then quit again. Had my local dealership reprogram the modules today and still no fix. Warranty the parts out and still nothing.
You need to test it at the starter relay in the video. Hope it’s understandable. That’s how I figured out the push button would work. Sorry for the late reply. Good luck.
Did the starter stay engaged and it start in accessory when you left it grounded before you put the start button on it? Is that the reason you did the start button? I'm having the exact same problem with a truck that I am working on. It was a 4.3 I put in a 5.3 and that is the problem I am having. Been chasing grounds and all that fun stuff for a week.
No - BUT if you stop the ground to the starter relay the starter should not turn. For example - w my push button if I hold the button in it will continue to turn the starter. Once I release the button the ground to the starter relay is stopped. Hope that helps you.
I’ve swapped out a the v6 for a v8 swap and having the similar problem on my 2002 Silverado except mine is a manual it started fine when it had the v6 but ever since I’ve done the swap it would on,y start if I jump the starter
I have this same problem, but then when it down finally start after letting it sit it starts up but then sometimes won’t go over 1000rpm and moves super slow any idea on why that is?
Just wondering: could the fuse box panel have a break in it that's causing a partial (low volt) short? Or the feed wire to that particular ground wire is cracked perhaps? You've proven that the starter is good because you bypassed it with your very cool push button start. Electrical problems can be quite tricky to nail.
Who knows... my original fuse box was messed up by mice/chipmunks which is why I replaced it. The truck was fine with that fuse box until the starter puked. Replaced the starter and the whole no start no crank issue began... I know I have a bad ground somewhere but the solution I came up with worked and is still working. I will update if the push button start fails but so far it’s been an “easy” solution.. good luck!
I have a 2004 2500 and it wont start after we knocked down the dash board after we put it back it wouldent start or crack.After that the yellow pedlock light came on and it wount start or carank what could it be
That's likely the anti-theft system. There is a way to reset it. I can't remember right off hand. Google can solve that one. I tried that on this truck also but it wasn't my problem.
Does everything operate like it should? Because yesterday I did the wire to relay starter method so I could drive and the a/c wasn’t working and there was a big power loss from the engine.
Clean your grounds!! I had a different truck that I had to solder on a new end to the wire that attaches to the starter cuz it was corroded. Fixed all my issues!!! Pay attention to corrosion!!! Trucks and electronics don’t like it!!!
i did this but just ran a 18 gauge cable from the relay to my battery, but now my abs light and brake light come on, as well as my ac not working and slow acceleration, like my transmission isn’t shifting, not really sure what the issue is. :(
I can do this to start my truck but my abs and brake lights stay on and my ac doesn’t work. I dont know what could be the problem. I have new starter new alternator new battery new ignition switch mabye the pcm? Ive checked my fuses all seem to be working fine i used to be able to start the truck once in a while but now it doesn’t want to start at all
Sorry for the late reply. You likely have multiple problems BUT if u are in the rust belt start by cleaning up the 2 grounds by the driver door on the frame. Grounds problem can cause multiple issues….
Used a 2 pair 12g wire. Grounded one wire to the firewall, ran that same wire into the cab and connected to one post of pushbutton. Another wire goes from the other push button post to the ground post on the starter relay. Hope that makes sense.
@@e6530C The ground at the starter relay wasn’t getting a solid connection so I just connected the push button to a good ground on the fire wall and the ground post on the starter relay.
@@andrewkelly9444 yes but the engine won't stop turning until you remove the ground. That's how I figured out it would work then I installed the push button to "stop" the ground connection from inside the cab.
So I had a key made at Walmart just to be a door key… well it turns out that somehow it started my truck so I have been using that key for a week now w/o any problems. Today i locked my keys in my ignition and had to slim Jim in and push unlock button to gain access inside. After doing so I got in and my truck wouldn’t start. Just acts as if the starter don’t work but I know its fine. The security light is flashing now as well. If I run direct power to the 10 amp fuse inside it don’t try to start either. Just a ding from Interior. But if I run power to a spot where the relay goes it cranks but sounds real weird and don’t actually start up. Lots of info I know but I’m at a loss and stuck in some parking lot. Anyone with any ideas on this weird situation help me out? Already did the 3x10 min off/on deal to reset security but did t work. HELPPPP plz.
@@miguelsk8r547 mine didn’t have anything to do with the key actually. It was a relay not fitting tight enough anymore . Stuck a wire in with it and bingo.. weird and was a trial and error for long time before I finally found the issue
If you ground it after turning the key to start and leaving in on and the truck starts when it wouldn’t before. A push button may be a solution. Watch the video again. Hope it’s clear.
Change relay, tried jumping the hot to battery, both NOTHING! I tried the ground I ran to chassis ground it just clicks the relay everytime i touch ground. Will not start doing any of this. So is my starter bad??
I’m just curious myself but did by chance did you happen to check the air neutral safety switch? Because the weather all set up now rather than just the power to the starter in the ground because I basically need to crank the starter. What you have done here basically the same thing. They go through the BCM in the BCM has certain checkpoints and if one of those don’t clear then it removes a sorce to the starter via the relay.
Hey man I'm not mechanically inclined at all I probably watched a hundred videos trying to figure this out.. 😅 Tried the wire from relay to positive on terminal and starter still won't crank . Bought a new starter tonight but afraid after watching so many videos starter not my problem 🙃
I ran a wire from the relay ground to the negative terminal of the battery eliminating the need for an inside push button. This is only a test of the emergency I can't start my f'ing truck relay system.
DONT DO THAT PERMANENTLY!!!!! If the starter didn’t turn your engine when u did that then the ground issue I had isn’t same the issue u have. Have u had the starter tested? They commonly go bad and that was my first issue - I had ground issues AFTER I installed a new starter.
Run the two wires into the cab - one from a good ground and the other that is attached to the starter relay ground post. Connect one wire to either side of the push button start prongs. Doesn't matter which wire goes on which prong. Circuit is only connected when you push the button. Hope that helps.
@@toddrabb1892ok so 2 wires into the cab. The wire that you have off the relay is green but at the firewall it’s yellow. Did you splice it? I’m trying so hard to follow you my dude.
I have a question I have 6.6 duramax van 2006 g3500 and my van will start in the morning but after an half hour of driving all my dash lights go hay wire and then back to normal sometimes stay off .. after I stop I have have to wait at least half hour before it will start also sometimes I turn it off my key domes out but van stays running…… help
