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Prev Professional Automotive Repair Technical Discussions for May 13, 2014
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Open Help Requests for GM
Help Request Answers
1998 Chevrolet K1500 Cheyenne 5.7L No Start VIN: 2GCEK19R3W
vehicle came in for no brake lights, we changed brake light switch, now no start. have checked spark, noid, fuel pressure,compression,passlock system, has new cap, rotor, wires, plugs,air filter and fuel filter.120# compression,54# fuel pressure,a/f ratio 9.6:...
2000 Chevrolet Silverado 1500 5.3L drl VIN: 2GCEK19T7Y
The drl dont work on this truck. Has auto headlamps on all the time.If you disable the drl with the dome overide button, the auto headlamps are disabled (normal).Body code b2647-light sensor circuit is stored.Did find a bad light sensor and replaced it. BCM sh...
2001 Chevrolet S10 LS 4.3L Fuel tank VIN: 1GCDT13W51
No start--diagnosed as faulty fuel pump--living in a salt belt , we discovered that the fuel tank was rusted so badly that it could not be saved. Where can you get a tank for this thing. Gm discontinued the tank, none available in the aftermarket world that i ...
2005 Chevrolet Aveo LS 1.6L Hesitation, Cuts out, Misfire, MIL Lamp on VIN: KL1TD52685
I have an 05 aveo...yes i know, you thought these were all destroyed...but I have one here. It wont take fuel, sounds like it is mifiring at a steady increase in throttle. It almost sounds like a plugged convertor which it isnt. Keeps setting cam and crank cod... Trouble codes: P0336, P0341 (Cam sensor performance), P0342 (Cam sensor low voltage)
2006 Chevrolet Silverado 1500 WT 5.3L transfer case control VIN: 1GCEK19B66
Have a strange one here. Vehicle came in with complaint of Transfer case select switch does not light up and service 4wd indicator is on. Scan and found C0327. Encoder return voltage (as reported by the scantool) is normal. Verified no lights on the switch....
2007 Chevrolet Silverado 1500 WT 5.3L Engine VIN: 3GCEK13377
Gentlemen, Got this 07 Silverado here with a P0300. Dead miss on #7 at idle with low compression. At highway speeds, higher rpms it is not so noticeable. I'm going to pull the VC in the morning to check out the lifter/rocker arm travel. Because I know that t...
2003 GMC C6500 Topkick C6C042 8.1L backfires under load VIN: 1GDJ6J1E83
I've been working on 03 topkick with 8.1.complate is backfire under hard load,WOT.rite off the bat I found intake duct rubbed through from drive belt.I thought easy fix.roadtest with same result.i smelled fuel so hooked fuel pressure gauge to ck if pressure wa...
2006 GMC Sierra 1500 SLE 5.3L Surge, MIL Lamp on VIN: 2GTEC13Z86
Well the problem child has these two codes come back within a couple miles sometimes even standing i have replaced intake gaskets maf to no results, smoke test shows almost no leaks tested brake booster blocked of line and smoke tested good results no leaks i ... Trouble codes: P0171, P0174
2007 GMC Yukon XL 1500 SLE 5.3L MIL/Stabilitrak VIN: 1GKFK16397
Hello to all; Got this GMC that came in with what seemed to be a straight forward issue. It had a P0300 code and once during diag it popped a P0305 code. Looked at the plugs they seem to be the original ones and did not look to good. Replaced them, but still h...
2013 GMC Sierra 1500 SL 4.8L 1-2 shift VIN: 1GT02ZCG8D
Hello, I have a 6L90 that slips for just a second when taking off in first gear, I was just wondering if an adaptive relearn would fix this or if it was a symptom of a stuck valve, or the wrong Torque convertor???
1990 Pontiac 6000 LE 3.1L check engin light VIN: 1G2AF54T5L
thanks for your time and input. The mil is on with dtc43 stored. Basic checks are ok after replacing the ks with both an aftermarket and oem no change, repair and tighten harness and connection, same. Bypass harness and still no change. Install a prom and that...
2001 Pontiac Aztek 3.4L No Start VIN: 3G7DA03EX1
I have a no start, has spark, no inj pulse,Fuel pressure at shrader valve, tool is broken cant get pressure reading. no codes. suddenly stopped running. been a very reliable veh with no starting issues until yesterday. replaced pressure reg, crank sensor hehin...
2003 Pontiac Montana 3.4L Poor Idle Quality, High Idle VIN: 1GMDX03E63
Can not figure this one out. Idles high 1500-2000. Can get to idle down 900. As soon as it goes into gear idle jumps up again. Replaced IAC, Replaced bad PCV hose on throttle body, cleaned MASS Air Flow. Replaced IAC With different vendor. IAC reads correct. J...

Fixes & Summaries for GM
Fix/Summary Answers
1999 Chevrolet K1500 LS 5.7L Stall VIN: 1GNFK16R5X
Well as i stated before i could not get this vehicle to stall on me. I checked all the ECM connectors and there were no signs of water intrusion. also checked all the bolts on ECM case to see if any were broken and could let water in ECM. none were broken. Che... Trouble codes: P0605 (Control module ROM), U1042 (Loss comm with EBCM), U1064 (Loss of BCM/VTD comm), U1193 (Loss of VIM Class 2 comm).
2005 Chevrolet Impala 3.8L engine VIN: 2G1WF55K65
Thank you all! The crank sensor relearn did it. I should know for next time to do it on GMs.
2008 Chevrolet Uplander LS 3.9L Floor VIN: 1GNDV231X8
I have not yet found the issues, I did try near ALL the suggestions given but could not locate the leak. A BODY guy I know is going to remove the fender and move from there to see if there is any seem damage. I will post again if we come to a conclusion.
2012 Chevrolet Impala LS 3.6L fans VIN: 2G1WD5E31C
first i want to thank everyone for your replies, I am still scratching my head because a new AC. compresser fixed this car. I have never seen one act like this but car is fixed .
2001 Oldsmobile Silhouette Premiere 3.4L No Start VIN: 1GHDX23EX1
i dont understand why i had a good scope pattern on my 7x crank sensor but went back and had open circuit on the resistance test. checked the wiring to make sure it was ok,replaced sensor and runs good now. customer said problem was intermittent and had gotte...
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