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Prev Professional Automotive Repair Technical Discussions for January 10, 2014
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Open Help Requests for GM
Help Request Answers
2008 Buick LaCrosse CX 3.8L Heating VIN: 2G4WF58248
Vehicle continues to lose sufficient heat temp at idle and has long warm up times in the morning. No codes, manual heat controls and hot/cold changes with control knob.
1994 Cadillac Commercial Chassis 5.7L No Start VIN: 1G6DW52PXR
No spark, no fuel. It has the DIS system with the plug wires coming from the front of the engine. I checked for codes, found none. Live data gives me an RPM reading of about 192 rpm and it blinks to zero. On occation the RPM blinked to 360+ RPM and it almost s...
1996 Chevrolet S10 2.2L Stall VIN: 1GCCS1444T
I have this 96 S-10 that will quit going down the road for the customer and will not start till it sets for a little while. It happens once or twice a month. I have not had it happen to me & it has been to several shops. It has no codes. I think is probably th...
2008 Chevrolet Tahoe LS 4.8L Poor Idle Quality, MIL Lamp on VIN: 1GNFC13C78
I need your help, i have a 2008 chevy tahoe that came in with intermitant check engine light on, found the listed codes po121 tps sensor & po573 brake light switch. I looked at throttle boby it was dirty so i cleaned it, started engine ran fine. Next i removed... Trouble codes: P0121, P0573
2008 Chevrolet Trailblazer LT 4.2L dies VIN: 1GNDT13S08
Vehicle died on customer several times, came in on hook. She reports (now) that it would act up when the voltmeter went above 14v to 15. Charged dead battery but would not hold load so I replaced it with Interstate unit. It still charges around 15.1 volts (14...
2011 Chevrolet Cruze LT 1.4L high fuel trim VIN: 1G1PG5S96B
Freeze Frames (2- both simmilar) RPM 735-732 ECT 204-188 IAT 48-42 MAF 2.38 g/s Load 20% LTFT 31-35% MPH 0 My current scan tool readings agree with the above data. High long term fuel trim only at idle. Runs steady at 13ish, or 20ish, or 27ish. O2 sensor has... Trouble codes: P0171
2001 GMC Safari SL 4.3L Surge, Misfire VIN: 1GTDL19W21
Surging under load about 4k rpm before it shifts into next gear. As it surges it flags muiltable cylinder misfires, but doesnt feel like a misfire, more like a fuel or air surge issue. Fuel pressure holds steady at 61 psi while it surges. Map sensor hold at 3....
2001 Pontiac Grand Prix GT 3.8L theft deterent module VIN: 1G2WP52K81
This car will start right up and then will kill from the fuel being shut off.After I put the cyl. in I relearned it twice and I still get the sercurity light flashing.With 5 volts from the pcm I know it is ok and with 50hertz from back probe at pin 70 it has t...
2002 Saturn SL1 1.9L Excessive Emissions, Poor Idle Quality, Hesitation, Surge, Cuts out, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1G8ZH52882
Customer called a month ago or so said they thought they had a charging problem, had a older battery replaced at a another shop, then a month ago had same shop replace a alternator, problem didn't go away, we had extreme cold coditions and car sit one day for ... Trouble codes: P1626 (Anti theft system fuel enable circuit), U1064, U1096, U1301, P0131

Fixes & Summaries for GM
Fix/Summary Answers
2008 Buick Lucerne CXL 3.8L Ignition VIN: 1G4HD572X8
Disconnected the battery and hooked up the jumper pack and everything is OK, battery is shorted. Replaced the battery and all is fine.
2005 Chevrolet Silverado 1500 LS 5.3L No Start, MIL Lamp on VIN: 2GCEK13TX5
At this time we have used a plastic bag to cover the ECM. Vehicle has not returned as of yet. We will post any other information if problem reoccurs. Thanks to all who replied. Trouble codes: P0480, P0300.
2004 Oldsmobile Silhouette Premiere 3.4L No Start VIN: 1GHDX13E64
Yes its a simple fix, the real key had a security diode in it and the K-mart recut didn't which gave me the code c3055 a no transponder issue. It should have said c3055 WRONG KEY instead of no code description. Thanks to Michael. Andrew, Ken, Wil, and Jonatha... Trouble codes: B3055 (No transponder moduation or no transponder).
2003 Saturn Ion-2 2.2L Starter VIN: 1G8AN1243Z
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