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  1. I have a 2014 GMC Sierra 1500 5.3 2WD 4 door. Only cold air coming out the vents. So i pulled the glove boxes out so I could see the blend door actuator. I could see the clip wasn't connected to the actuator. So I connected to wire clip to ghe actuator, and was excited to see if maybe I had found my no heat issue. But, now my teuck won't crank. Turn the key, 1 click and nothing. Ive checked every fuse. All good. I even jumped the starter relay. The truck would turn over but wouldn't start. I'm clueless.
  2. 2014 sierra 1500 5.3. Blend door actuator wasnt working. I pulled the glove boxes to look at actuator, noticed the wire clip wasn't even connected. Connected the wire clip to the actuator. Went to crank my truck, nothing. And now I have stabilitrac messages on my dash. And one about steering wheel assistant limited or something like that. I've checked all my fuses. They're good. Where do I start??
  3. I recently got a 2000 chevy s10 LS 4.3 v6 4wd that wont start it cranks no problem everything else works but the security light is always on it never flashes its solid i have tried the relearn procedure 10 times nothing i have scanned it for codes got none i have tried putting a ziptie tip in the passlock plug in and nothing i have found a forum that is having the same issue but they did the resistor and it didnt work for them i dont know what to do to fix it and get it to run i dont have the money and dont want to take it to the dealer so dont suggest that if you know how to fix it please let
  4. 98 Sierra 1500 5.0 vortec 4x4 SLE ext cab 295xxx Ill try to keep this short, any help appreciated thx in advance. My front signal and head light started doing all sorts of weird things head lights flashing with 4 ways, left signal wouldn't work with head lights active. The interior lights where acting weird. Work sometimes. The cluster gage illumination would not turn off. And there was nothing to rear rail or third break lights. Also some funky noises coming from the combo light relay So I thought it was ignition harness, cluster,dimmer switch relay. All fuses whe
  5. I have a 2006 4.3 V6 Silverado 1500 WT that as of yesterday will not start. The last time I drove the truck was about a week ago before I parked it at the house. Luckily, its in my driveway so I can work on it. I'm a little confused though on why its not starting. I have tested the fuel rail pressure and have 59lbs when the fuel pump is engaged and about 59-61lbs when I try to crank the engine. I've tested the spark on all 6 cylinders with an inline spark tester and have posted the video of the number 3 cylinder's test below. They all managed to light the plug up telling me I have
  6. I own a 1995 gmc sonoma and it left me sit earlier today. After working on it for awhile I discovered a few problems. The motor had no spark or fuel, I figured out the coil was bad and now it has spark and it starts on starting fluid but the tbi injectors aren't spraying. The fuel pump does prime but we aren't sure of how much pressure it's building. We put in new injectors and cleaned the entire throttle body and fuel is making it to the injectors but the injectors don't fire. Any ideas? Do the injectors require the 12 psi of fuel pressure in order to fire or is there another problem?
  7. Hello I have been working on my GNC for far too long now. It all started with the radiator and then the transmission finally leading up to the battery and or the park neutral safety switch. My current problem is I'm getting the no crank no start which has me assuming it's a parking neutral safety switch, I've been trying to line it up perfectly and get it on there onto the transmission without any success. I'm also experiencing very rapid draining of batteries. My last one was dead according to the AutoZone people, and when I use my friends to try and test and see if I can get some crank withi
  8. 2002 Silverado 200k I pulled the trans to replace the rear main seal and put the truck back together and now I get no response when I turn the key to start. For troubleshooting I have: Replaced the NSS, both of the NSS pigtails No start, dash is indicating gear, reverse lights activate. Pulled starter and had it tested it multiple times and its good If I connect a test lead to the solenoid it turns over but dies after a second. If I apply 12v to the purple/white wire and the orange wire in the NSS harness the starter relay clicks. If I connect those two wires together and jump
  9. Hey new here, I have a 07 NBS Silverado 4.8 4x4 that has a no Crank no start issue. Never had this issue usually starts right up. So drove to the gas station one night recent and Midway got a reduced engine power and died, would not start back up at all, had it towed and have been checking certain things battery, starter, fuses I've read alot on here and other sites. I figured maybe some insight to my case would be of help. I don't hear a click at all when trying to start it simply does nothing. I've tried a new battery , I've checked cables power and ground cables. Checked mega fuse and light
  10. Hi, first time posting on here, I hope I am not bringing up an issue that has been solved or brought up elsewhere. Here we go, I have a 2015 single cab swb 4x4 that came with a 4.3/6l80e, i have swapped this to a 2017 l86/ 8l90e. Truck was fully operational prior to swap no issues, upon completing the mechanical portion of the swap and starting the electrical checkout I have run into some issues. Truck will power up bcm/ gauge cluster with no issue/ lights but I have no ecm activation as fars fuel system coming on or engine rolling over. I am getting the following DTCs: 2535, U0100
  11. Hi, first I need to say at everyone that I'm French and my English is bad ?. I have a chevrolet 1989 C3500 with a 7.4 engine. I drive on the highway when my truck stop like if I turn the key off. The two tank was full of gaz, I start and the engine crank so the gaz doesn't run to the throttle. Someone has the same problem in the past and can help me?
  12. I'll start by saying ive been searching this site for years. Great data base! Today is the first time ive needed My own thread, sadly. So, here goes after searching since 10pm lastnight across all platforms. Please accept my gratitude for even reading this post! ____________________________________________ 2003 GMC Sierra 1500HD - Quadrasteer SLE Ive been loosing fuel pumps back to back for the last 6+ months. They lose pressure and i start getting random missfire. Before putting in my fourth pump and lighting the fuse to number five. I decided to go after all t
  13. 2007 suburban k2500. 6.0/4l80e. I have a click when cranked situation no start. Also, power locks cycle every time it’s cranked. If you hold the key in the crank position it’ll click every few seconds. With the key in the on position I’ve had multiple windows roll themselves down, locks cycle, all kinds of dash lights. So far I have replaced the battery, the starter, main power wire from fuse block to battery, starter power wire to battery, I’ve cut the end off the alternator power to battery cable and terminated all these wires with a different style battery clamp. I am bypassing the 175 amp
  14. Hey guys, I'm new to this forum and new to owning my first chevy truck (with a small problem - hopefully!) and I wanted to post this here for some help/advice/guidance. I have done some research on this problem and only found one other post on the internet with this problem so it seems like a rare one! Unfortunately, the post I found died once the OP stopped responding. So here is the story and the problem:. As of yesterday, I am the new owner of my first Chevy truck! It's a: 1989 GMC Sierra 2500 with a TBI 350 It's completely stock and run
  15. My son has a 95 Chevy Silverado 1500 4x4 5.7 Liter VIN K Truck. He noticed over the last couple of weeks he would need to continue to turn the key to get the truck to start. Last night he drove the truck, sat for about an hour truck would not turn over. Lights on the dash came on (but they where sort of dim) so we assumed the starter finally gave it up. We went to local parts store, bought a starter installed in the parking lot went to start the truck still nothing. We checked the battery with on ohm meter, check fuses everything seemed to be ok. I ended up jumping the connections on the start
  16. 2011 Chevy 2500 HD duramax. So this is an issue that had only happened a couple of times. And had only happened on the initial start after using autostart on colder days (low 30s). After starting the truck with the auto start, the truck will run for approx 2-4 minutes then stop. The truck will not start again with they key until you you have cycled the ignition a few times. So my guess is I’m losing fuel pressure but this only has happened, so far, when using auto start. If I use the key is used on the cold start there are no issues. And I haven’t experienced these issues at any other t
  17. Can you guys offer any suggestions or tips before I go to stealership? '16 Sierra Denali, 40,100 miles. I bought it 3 weeks ago with 39,800. Randomly displays 'service theft deterrent system' and I cant start. Dash lights up etc, but cant start. Have had to use oem remote-start as a work-around, but that isnt working now either. The engine will start but as soon as i put the key in, turn to 'on', and put in gear, engine kills. Battery is original, but good. Reading 12.6v engine off, 14.1v running, and load test is good. It seems to happen more when stopin
  18. Hi all, thought I would post this in the event someone else has a similar problem. 2015 Sierra 6.0. 40k miles. Truck would not crank when the key was turned. Screens would go blank and nothing. If I tried enough times, I could get it to start. Took it to the dealer, was able to replicate the issue, and dealer diagnosed the truck with a bad ECM. Tech said normally, it’s the junction block on the battery or even a bad starter. ECM replaced and all is good. Covered under warranty.
  19. I purchased my 2018 gmc 2500 hd 3 month ago since that time it has been to the dealership 5 times. First at 887 mile I was getting power steering fail warning dealership couldn't duplicate it so they sent me back out with it. After a few times of this after a few more miles I got it back to them with the light on the dash they finally decided it was the power steering censor and replaced it. Then at 1100 mile truck wouldn't start turn the key and nothing. Again dealer couldn't find the issue. It is now back in the shop for the same problem they are still unable to duplicate it. Gm tells me to
  20. So many strange electrical issues that have me at a standstill .. tried multiple fixes for the intermittent no start issue . Leaking back window is a mystery and not something I feel is due to anything I've done or not done. . Yet no fix for that unless I'm paying for it ...the mother recent attempt to fix the random starting issue was the 175 amp mega fuse ..I'll post how that goes after replacing and running a while. Any other fixes or help toward getting thru the electrical nightmare are appreciated!
  21. I have a 2011 Silverado with the 5.3L. This last week I was having issues with hard starts after sitting 8+ hours. It would stumble, but start and after a few seconds it would straighten out. I read elsewhere on this site where others were having very similar issues and letting the tank get close to empty and then filling the tank seemed to fix the issue for several people, so I tried this too. I just filled the tank last night and when I went out to go to work this morning, it wouldn't start at all. The first time I tried to start it this morning, it acted like it was going to do the same thi
  22. Please help. I have an 02 Suburban with a fuel pump issue. The fuel pump went out. I had my neighbor kid swap it out. When he replaced it, he broke the nipple on the vapor canister, (not sure if that’s relevant). He reinstalled the tank and we went to start it up and.... nothing. The gas gauge wouldn't read and there was no fuel going to the fuel rail. We dropped the tank again and I noticed that he installed and adapter on the wiring harness. I disconnected the adapter and plugged it in directly. The gas gauge kicked on, the truck started up, then sputtered out. I checked fuel pressure with t
  23. Hey all, I drive a 97 k2500 p/u w/ 5.7L. I'm trying to diagnose all the problems listed above, but don't have a lot of experience (or money for that matter). As far as the no start problem, it will sit and crank forever, but the only way I can get it to start is by applying the gas pedal and even then it still struggles. In addition to all that, it struggles and stutters and just generally has no balls. I thought it might be the fuel pressure regulator so I got a fuel pressure gauge and attached it to the schrader valve. When I turned it to accessory and let the fuel pump run, it shot up
  24. i have a 2003 chevy silverado with a 5.3 in it i have just rebuilt the engine it started up and ran fine for about 2 minutes then the rpm started to drop and the truck died and wont start back anyone have any ideas i know the spark plugs are fireing and the motor has no codes in it any help will be greatly appreciated
  25. Sorry if something similar has already been posted but I haven't found a solution that works. My 2004 Silverado 1500 LS, 5.3L Vortec is giving me all kinds of fits. Would be happy to elaborate the long story but going for the short to start with. I have been having problems with hitting the key and nothing but a dash reset; this has been intermittent since the first of the year and usually would clear itself up. When this happens I get all kinds of weird lights and messages but no codes. It would usually clear itself up within a couple of days then I could drive for a few weeks with no
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