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Prev Professional Automotive Repair Technical Discussions for July 23, 2013
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Open Help Requests for GM
Help Request Answers
2003 Chevrolet Silverado 1500 5.3L compressor VIN: 2GCEK19T33
Customer brought in a couple of weeks ago same B0159 code replaced temp switch and repaired plug. Still set code replaced control head still set same code. All parts replaced were GM factory parts. We also tried new ac pressure switch knowing GM had problem wi...
2004 Chevrolet Silverado 1500 5.3L Hesitation VIN: 1GCEK19T04
hey techs, this chevy came in with mulitple missfires on bank 2. found o2 reading about 1100mv at start up and voltage would slowly drop down below 450mv and finally start to fluctuate and vehicle would run better. i install new 02 sensor and got same results.... Trouble codes: P0300
2006 Chevrolet Silverado 2500 HD LT 6.6L Tcm VIN: 1GCHK23D86
Original TCM was replaced because of what we thought was a voltage spike, truck wouldn't crank. First new TCM solved starting problem but left trans in limp and no PRNDL. Sent to dealer to have TCM flashed, dealer sent it back said couldn't communicate with TC...
1997 Pontiac Firebird Formula 5.7L Clutch VIN: 2G2FV22P2V
First time customer, vehicle towed in. Clutch in pieces and flywheel had severe hot spots. Refaced flywheel, New AMS clutch kit, trans mount, new flywheel bolts, fluid change. On roadtest, detected noticeable clutch shudder on acceleration. We weren't satisifi...
1998 Pontiac Sunfire GT 2.2L Hesitation, Misfire VIN: 4G2JB3247W
This vehicle came in complaining of a misfire. Mostly on highway cruising speeds. Sometimes when taking off it will hesitate. Ive only felt it on the highway and it feels like a strong ignition misfire. Very intermittent. I replaced all plugs, wires, both igni...
2003 Pontiac Aztek 3.4L cv axle VIN: 3G7DB03E03
car cam in with growl noise.i was told to replace rear axle tourque tube and rr cv axle.Noise was gone. I found out later the rr cv axle has been changed before by another shop. so car came back 2000 miles later rear diff is whinning. so we replaced that also ...
2003 Pontiac Sunfire SE 2.2L Odometer VIN: 1G2JB12F73
Hello everyone, we have this Pontiac that came in with a dead cluster. All the gauges were inop, no scan tool communication. Checked power and grounds, replaced cluster with used. Everything worked but no odometer . Thought we had a bad one so we tried another...

Fixes & Summaries for GM
Fix/Summary Answers
1999 Buick Regal GS 3.8L Drive-axles VIN: 2G4WB52K0X
This car is fixed, thanks to the replies I got on IATN. We took down the starter and sure enough, the starter drive was apart. After replacing the starter with a new one, the noise is gone. Thanks again to IATN and the guys that took the time to respond.
2004 Cadillac CTS 3.6L Hesitation VIN: 1G6DM57774
You can indeed get to the harness if you remove the upper intake and you are willing to get a few scratches on your arms. I guess the proper way would be to drop the cradle and lower the motor but in this case, removing the upper intake did the trick.
2001 Chevrolet Blazer LS 4.3L Stalling VIN: 1GNDT13W01
So after letting the truck run idle for hours, with the fuel pressure gauage hooked up when putting I in drive to pull in and giving it a slight bit of gas the truck stalled and when it stalled the fuel pressure went to zero psi, I ended up installing a new fu...
2003 Chevrolet Avalanche 1500 North Face 5.3L Tcase Module VIN: 3GNEK13T23
after repeated attempts to program/ communicate with the new ATC module , we tried another MDI and the program went through on the first try. Not sure if the problem was with our MDI or our laptop at this point.
2006 Chevrolet Silverado 2500 HD LT 6.6L transmission VIN: 1GCHK23D86
Thanks for all replies ,all good info.I did replace ignition switch and got to communicate with TCM with key on engine off or running. Thought problem was solved, so called in a private contractor we use to flashed TCM because ,I,m p...ed at dealer service dep...
2001 GMC Sonoma SLS 4.3L MIL Lamp on, Mystery Misfire VIN: 1GTDT13W11
Still not fixed. we have gone back over some of the old ground per your suggestions, compression pretty even, #4 which is the worst misfire has the highest at 120, range is 120 to 110 cold. We soaked in a can of BG 44K thru the pcv hose, it helped a little, ... Trouble codes: P0300 (Misfire detected), P0304 (Misfire cyl 4).
2011 GMC Acadia SLE 3.6L Temp. VIN: 1GKKVPED9B
Thank to all take time for me. Many of you gentlemen hit the trouble. Problem is very dirty betwen rad and cond. Yes this Acadia have 170,000 km, the owner is manager big road contruction compagnie all the time on road. Many thing to dissasemble to see rad-con...
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