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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for June 5, 2013
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Open Help Requests for GM
Help Request Answers
2002 Buick Century Custom 3.1L Hesitation, Surge VIN: 2G4WS52J02
Well,this one is a little mystery.There are no codes and the intermittent symptom feels like a misfire. I checked the archives and found common problems of coils,injectors,and fuel pumps. I have tested fuel pressure 50#;plugs look good,low mileage.Pulled the p...
2003 Buick LeSabre Custom 3.8L Stall VIN: 1G4HP52K23
This Buick runs like a top, then without warning will just shut right off. It will restart imediataly run for a while then just quit. Fuel pressure holds steady. No codes. With my scanner attached, the instant before the engine quits, it loses communication th...
1998 Chevrolet K1500 Cheyenne 5.7L master VIN: 1GCEK19R6W
if you drove this truck & no one told you about the brakes it would scare you when you hit the brakes. The peddle is very low & spongey and has been for years.If any one knows why please tell me.charles
2003 Chevrolet Silverado 2500 HD 6.6L engine VIN: 1GCHK291X3
vehicle came in with coolant in oil, about 1 1/5 gallons in oil.when 1st checked the cooling system would not hold pressure,with engine pan drain plug removed coolant would gush out of pan fairly quick, we removed new oil cooler to check o-ring seals and found...
2004 Chevrolet Silverado 2500 HD LT 6.6L tube VIN: 1GCHK29144
this is my personal vehicle. there is a tube on the right front of the engine that occasionally starts puffing out smoke. sometimes at a stop it looks my valve cover just let go. some times it does not smoke at all. the injectors were replaced about 20 k ago. ...
1995 GMC K1500 Sierra SL 5.7L Speedometer VIN: 1GTEK19KXS
This one came in with a intermittant no speedometer and no Tachometer. When the problem occurs (no tach and speedo) I still have good rpm and VSS readings with the scan tool. Also, when the speedo and Tach are NOT working the transmission goes into default mod...
2007 GMC Sierra 1500 SLT 6.0L No Start VIN: 2GTFK13Y87
Looking for some help from some GM tech's. This truck came in for a brake job. It was on the rack for the weekend in neutral so the key was off as far back as possible. (Alternator light on but the ignition system off). Brake job was performed and the battery ... Trouble codes: U0140 (Lost communication with the BCM)
2002 Pontiac Montana 3.4L Cuts out, Stall VIN: 1GMDX03E72
Hello gentlemen. I have an 02 Montana here with a problem. New customer, just stopped in the other day with an intermittent stalling problem. He said that he had this problem previously and a shop in northern FL replaced the TPS, which seemed to fix the car fo...
2006 Pontiac Montana SV6 3.5L Hesitation, Stall, VIN: 1GMDV33L56
When you are driving down the road.vehicle will stall then the trac control light comes on no codes at the same time the signal lights will not work. After turning ignition switch off the signals will work and tc light goes off

Fixes & Summaries for GM
Fix/Summary Answers
2006 Buick Lucerne CX 3.8L Hesitation VIN: 1G4HP57266
I appricate all that responses I recieved on this vehicle. I thoroughly inspected wiring harness from sensor to pcm. Couldnt find any issues at all. we replaced the MAP with a oem part and going to drive and see what happens. Only time will tell for sure if th... Trouble codes: P0107 (Map sensor low voltage), P1107 (Map sensor int. Low voltage).
1995 Chevrolet S10 LS 2.2L Poor Idle Quality, MIL Lamp on VIN: 1GCCS1947S
Thanks for the help. Sometimes the brain fades and forgets about the basics. Found the engine oil was fuel fouled. Performed an oil and filter change and now the fuel trim numbers are near normal. Greatly appreciate all the help. God Bless each of you. Eric. Trouble codes: 45 (Rich Exhaust).
1998 Chevrolet Prizm 1.8L engine VIN: 1Y1SK5282W
thanks techs i do close this with out a fix still not sure what the problem is did check for exhaust restrition non found replaced the crank sensor and as stated before the cam sensor was replaced rechecked fuel pressure and compression and spark all is good ...
2008 Chevrolet Colorado LT 2.9L Hesitation, Cuts out VIN: 1GCCS19988
The customer took the vehicle to the dealership. The throttle body assembly would fix this concern, but with the price of the part, they wanted to be sure. Trouble codes: P2135 (throttle position sensor 1-2 correlation).
1991 Pontiac Trans Sport 3.1L no spark VIN: 1GMCU06DXM
The old Pontiac now has spark. The problem turned out to be the tachometer module was grounded and prevented the IGNITION module from triggering the coil. Snipped wire to tach (white wire in vehicle harness to coil) and performed the module test wherein you "t...
2005 Saturn Vue 2.2L Stall VIN: 5GZCZ43D85
After leaving the vehicle with our shop not getting the problem to reoccur for 3 days the customer decided to pick it up. We checked in with her a few different times and the problem has not come back. Never found any known problem other than moving some engin... Trouble codes: P2138.
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