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Prev Professional Automotive Repair Technical Discussions for May 10, 2013
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Open Help Requests for GM
Help Request Answers
1997 Buick Park Avenue 3.8L 2nd 3rd 4th gear VIN: 1G4CW52K9V
I drove vehicle 40 mil round tip parked ran into the town office hoped back in and no shift 1st gear only. windows and door lock's inoperable the interior light's do not come on when door's are opened. when doors work the trans shift's fine. No code's pcm ,bcm...
1991 Cadillac DeVille 4.9L relay VIN: 1G6CD53B8M
We have an intermittent no crank and I want to check the crank enable relay but we can not find it. Mitchell shows it on both sides under dash and I havent found it on either side. need a Caddy guru! Thanks in advance
2003 Cadillac Seville SLS 4.6L Electronic VIN: 1G6KS54Y73
please help you caddy guys car came in warm air on cold on pass side fond broken drivers side temp door replaced now left side actuator stuck on 2.55 volts tried recalibration still same ac pressures are good still not cooling out of left side right side is ic...
1988 Chevrolet Camaro Iroc-Z 5.0L Hesitation, Surge, Cuts out VIN: 1G1FP21FXJ
Hello. Blast from the past. Have 1988 camaro Z28 5.0L, IROC. Car is skipping power under light steady load, highway speed 65Mph 2500rpm. It feels like fuel starvation or misfire. Not misfire like one cylinder but misfire like ignition coil wire disturbing mome...
2006 Chevrolet Silverado 1500 LS 4.3L MIL Lamp VIN: 3GCEC14X46
No MIL, no codes in BCM, Cluster, PCM. Mitchell shows this as an LED. Has an EVAP code, scanner shows MIL commanded on. Is this a common issue with the cluster? Like GM never has a cluster issue...Bill@Fred's
2008 Chevrolet Express 3500 6.0L MIL Lamp on VIN: 1GBJG31K98
hey guys. i have not delt with this code before. it came in first time with same codes. found intake leaking. replaced gasket. trims looked good +- 3. came back same codes. found nothing wrong.? clear and ship. back now, same same. i looked at freeze frame and... Trouble codes: P1174 (Fuel trim cyl. Ballance b 1), P1175 (Fuel trim cyl. Ballance b 2)
1999 GMC Yukon SLT 5.7L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GKEK13R5X
Vehicle came in shop with p0302, rough idle. Scoped #2 it seemed to have a short burn time. Installed new plug,new wire and cap same issue. Did a injector power balance with tech 2 all injectors same result. Did a relative compression test showed #2 low,checke... Trouble codes: P0302 (2 misfire)
2003 GMC Savana 1500 4.3L Misfire VIN: 1GTFG15X03
Are there any suggestions from anyone? It would be of a big help. Trouble codes: P0300 (Missfire occurs in 2 cylinder only)
2004 GMC Envoy SLE 4.2L secondary air pump VIN: 1GKDT13S94
I am getting the code for the secondary air pump failure. This is the pump that runs form the intake to the air cleaner. I have replace the pump approximately 6 months ago and it was filled with water. I just pulled this pump and again it is filled with water....
2004 GMC Yukon SLE 4.8L Poor Idle Quality, Surge, Misfire VIN: 1GKEK13V74
Hey guys, one more. 2004 Yukon w/ 4.8 L. This truck belongs to a used car lot so I don't have much history about it. Here is the problem, it came in idling rough, fuel pressure is good, I checked for all kinds of vacuum leaks with a smoke machine and found non... Trouble codes: P0300 (Multiple misfire code)
2007 Pontiac G6 3.5L Hesitation VIN: 1G2ZG58N37
Customer complaint poor acceleration. No codes in system. Car accels from stop well, starts to bog right before 1-2 shift. Really bogs down after shifts to second on light acceleration. Also occurs in 3rd gear on light accel. If you press the throttle, it will...
2007 Pontiac Montana SV6 3.9L Stability System VIN: 1GMDU33127
Had code C0196 Yaw Rate Circuit Malfunction. Checked wiring near air box, sensor, transmission etc. Anything I could find searching recent posts I checked. Replaced sensor, Vehicle came back again, customer states the vehicle tried to pull her into another lan...

Fixes & Summaries for GM
Fix/Summary Answers
1996 Cadillac Fleetwood 5.7L low power/vacuum VIN: 1G6DW52P8T
Unfortunately this one will remain unfixed. I have checked everything mentioned in the replies. Valve lash is set just right (contact plus 1/2 turn), cam timing is correct as is ignition timing, EGR is not leaking, there are no significant vacuum leaks. Even i... Trouble codes: P0171 (lean bank 1), P0174 (lean bank 2), P1171 (lean during acceleration).
2000 Chevrolet Impala LS 3.8L starter & dash lights VIN: 2G1WH55K1Y
the coustomer(preacher)has trouble raising the funds to do the repair. Car is still here, collecting dust. Thanks to all whom put in effort on this endever.
2004 Chevrolet Classic LS 2.2L Air Bag Light VIN: 1G1ND52F34
DO NOT INSTALL JUNK YARD SDM(AIR BAG MODULE)!!!. After all dead ends it generally comes down to what your wallet can take. I was on the phone with Delco techs and nothing was coming up short than the fact that the junk yard SDM corrupted the system. People nee...
2008 GMC Sierra 1500 SLE 5.3L compressor VIN: 3GTEK13J68
Thanks for all the responses, Ive spent multiple hours on this vehicle due to it being so erractic. Well what we did to find it was to allow it to idle for 2 hours with ac on. then we went on a long road test with the Tech 2 installed. After 10 miles or so the...
2001 Pontiac Grand Am GT 3.4L fuel pump VIN: 1G2NW52E51
Thanks guys, checked circuit and connections, replaced relay and car has been in service for 2 weeks with no problems with several rain storms. We appreciate all the help and sharing of your experiences. Mike
2000 Saturn LS1 2.2L Hard Cold Start VIN: 1G8JT52F9Y
Thank you all for your help. Here is what I found. The ignition coil pack was at fault. Replace and retested and never had any further problem. I had good crank signal and good ignition signal but it was not firing properly at cold start. Trouble codes: P0300 (Random Misfire), P1599 (Engine Stall/Misfire Detected).
2003 Saturn Vue 2.2L security VIN: 5GZCZ23D23
well this one is fixed. the pcm was bad and so was the bcm. i have a junk vue same year here at the shop so i installed the pcm and bcm and had it reprogramed at the gm dealer. the customer is happy and im happy this car is fixed. thanks for all the replies
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