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Prev Professional Automotive Repair Technical Discussions for March 20, 2007
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Open Help Requests for GM
Help Request Answers
1993 Cadillac DeVille 4.9L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G6KD54Y03
Hey guys; This one is killing me. 90% of the time this has a dead miss #6 cylinder. Pulled the spark plug and was fuel fouled. Installed new plug and still missing. Performed injector balance test (OK); Scoped with low amps probe #6 injector (good - even show... Trouble codes: P0300 (Random Misfire), P0385 (CKP Sensor B)
1998 Cadillac Seville SLS 4.6L various VIN: 1G6KS54Y4W
thanks in advance! I have a short to ground in the white wire coming off of pin E connector 2 of the ignition switch. it goes to the igniton feed input pin on the PCM, to the [...] module, the dash integration module. i have disconnected everything and am ...
1978 Chevrolet El Camino 5.7L 2-3 shift VIN: 1W80L8Z478
automatic transmission no 2-3 engagment, and slips in reverse. i have been restoring a el camino and have gotten to the leaks. i pulled the transmission for a complete re-seal. replaced all the seals and bushings in the pump plus the sealing rings. the transmi...
1993 Chevrolet S10 2.8L No Start VIN: 1GCCS14R3P
There is very little testing done due to the fact that I don't have the vehicle yet. The testing that has been done has been directed over the phone. customer states vehicle just died. cranks good but will not start. spark is good to plugs, will attempt to st...
1994 Chevrolet K1500 Cheyenne 5.7L Hesitation, Cuts out VIN: 1GCEK14K3R
Original concern was driving along at 55mph with tcc locked if the truck encounters a hill or a slight head wind the truck bucks and jerks badly. If you crowd the throttle a little and the trans kicks down it comes right out of it and runs well. O2's dont seem...
1995 Chevrolet Tahoe 6.5L Drive-axles VIN: 3GNEK18S6S
updated actuator with new harness. where does brown wire go?
1997 Chevrolet Cavalier 2.2L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G1JC1246V
Ok guys this one is about to drive us nuts and im not sure what to do from here. I am posting this from home for one of my techs. Here is the scoop. we put a head gasket on this thing. We got it together and it was running fine for at least 15 min or so and th...
1998 Chevrolet Corvette 5.7L trans VIN: 1G1YY22G7W
after changing out differential assy with owners used unit, engine will stall almost immediately as you begin to roll, forwards or backwards...on slight acceleration...there are no engine codes, but have no communication with transmission. this diff exchange w...
2001 Chevrolet S10 2.2L No Start, Poor Idle Quality VIN: 1GCSS14591
This vechicle came to me with a hard start & poor idle problem. The owner claimed it would crank over but not fire. In addition, during cranking, at times it would kick back like a timing problem. If it did start it would idle poorly and sometimes stall. It wa... Trouble codes: P0621 (Gen lamp L circuit control problem)
1984 Pontiac J2000 Sunbird 2.0L choke light VIN: 1G2AB69B7E
choke light stays on. choke resistance with koeo is 4-5ohms start engine and the resistance goes to 1 million ohms, if I disconnect the alternator then resistance goes back to normal. I have 14 a/c millivolts on the ground line with koer. this is an old proble...
1994 Pontiac Grand Prix SE 3.1L No Start VIN: 1G2WJ12M2R
hi people I need help from a good GM teck I got this pontiac thats kicking my butt I whent as far as replacing everything thats related to ignition system but no luck car came in on a tow with overheated engine. a few hours earlier I advise custumer to leave v...
2005 Pontiac Grand Prix 3.8L Hesitation, Surge VIN: 2G2WP522X5
the vehicle has an int hesitation off idle on accel from a stop. It may not happen for several weeks but when it does happen the condition will be present until the ign is cycled then the problem will go away. there is no codes set and no after market parts on...
1996 Saturn SC1 1.9L Transmisson VIN: 1G8SK527TZ
Hello everyone...We are having a difficult time trying to find transmission code p0711-which the snap-on scanner tells us "Transmission Temperature Sensor out of range". Scanner shows actually temp around 125 degree's (f). Everywhere we look, we cannot find an...

Fixes & Summaries for GM
Fix/Summary Answers
1999 Buick Regal GS 3.8L Maint. Light VIN: 2G4WF5219X
The the DRL was not working. Found 1 bulb burnt out. Replaced the bulb. There was something wrong with the DRL circuit. Customer declined to have it further diagnosed. The customer had the DRL circuit repaired approx 2 weeks ago by a dealer. So he is going bac...
1993 Chevrolet K2500 Cheyenne 6.5L Engine VIN: 1GCGK29F9P
Well I got lots of answers on this one. It looks like it could be done but I think with the extra compresion head gaskets would be a problem. So I will stick to the 6.5 Thanks for all your help !!!
1994 Chevrolet S10 LS 4.3L abs codes VIN: 1GCDT19W9R
Well this one turned out to be the control module. 9 replies all pointed to either control module or BPMV valve.Ended up clearing all codes and waiting for abs light to come back. Power & ground to module was good. Truck has been gone without problems for a we...
2000 Chevrolet Impala 3.4L low coolant indicator VIN: 2G1WF55E8Y
Thanks for all the replys. We flushed the radiator and cooling system with a cooling system cleaner availible at NAPA. We removed and carefully cleaned the sensor. We refilled the system with Dexcool. It's been on the road for a couple of weeks with no problem...
2000 Chevrolet Astro 4.3L air flow VIN: 1GNEL19W9Y
You can see from the replies that others have had this problem due to the heater cores having gotten plugged. We have yet to get this van back, but I intend to start there. I will post my results when I have the van fixed. thank you for all of the replies.
2000 Chevrolet Lumina 3.1L air bag VIN: 2G1WL52J1Y
thanks for all the great help. i replaced the sdm module and repaired the connections on the pass. side air bag. all seems good at this time and all data now within specs
2000 Chevrolet K2500 7.4L lack of power VIN: 1GCGK23J2Y
I talked to an old friend who is a trainer. He said to verify that there is excessive backpressure, disconnect MAF sensor and drive vehicle running off of MAP, when problem occurs the map value will increase with load, but the odd thing is to watch short term ...
2001 Chevrolet Blazer LS 4.3L Starting VIN: 1GKCS18W61
Hi all, Thanks for all the input. I guess I did not put in my origional message that the no shut off issue was not consistant. Although it would happen more often then not. We had the column covers off and with the ignition switch was in the off position(which...
2001 Chevrolet Silverado 2500 HD LS 6.0L booster VIN: 1GCHK23U11
Sorry for the delay. Customer got sick and didn't bring truck back right away after we first looked at it.Anyway thanks for the replies. A clue I learned, the steering wheel would twitch when the brake pedal was tapped.After R&R accumulater truck works good. R...
2004 Chevrolet Silverado 1500 5.3L speedo VIN: 1GCEK19T34
thanks you guy the problem is in the cluster i called gm and they need to know the numbers one the back of the cluster,vin# and if it has a trans gauge,how many hours on the hour meeter,and also milage the cost is $375.00 my cost with core.will get new one in ...
2004 GMC Envoy XUV SLT 4.2L Hesitation, MIL Lamp on, LACK OF POWER VIN: 1GKET12S64
Thank you for the replies. upon further testing, I discovered that the catalytic convertor was restricted. This may have been caused by a previous performance issue that the customer had experienced. Back pressure test confirmed that exhaust flow was too low. ... Trouble codes: 0171 (system lean bank 1), 1133 (insufficient switching b1s1), 1171 (system lean during decel), 0172 (system too rich).
1995 Oldsmobile Cutlass Supreme SL 3.1L air bag VIN: 1G3WH52M0S
Hi Thanks for the information that I recieved from James-Glen and Eric for putting me on the right track. After more testing we are sure that the clock spring is bad, but coustomer declined repair because of cost. Also thanks to Michel for some go info. on sen...
2000 Pontiac Sunfire GT 2.4L MIL Lamp on VIN: 1G2JD12T7Y
after repeated test drives with the scanner hooked up and not finding anything wrong i took a break and thought about it. what i did not catch on the first ten looks was the throttle angle was showing 8% at idle or with the key off. i tested the tps and all wi... Trouble codes: P0122 (tps voltage low).
2001 Pontiac Bonneville SE 3.8L Surge, Stall VIN: 1G2HX54K51
thanks to all for help was very helpful found the pressure regulator was leaking fuel replaced regulator and road tested ok cust.has now and so far is ok.
2004 Pontiac Grand Prix GT2 3.8L Cruise Stops Working VIN: 2G2WS52294
Well it's fixed. I wanted to wait a few weeks for the customer to get back and confirm. As the above data mentioned...it all pointed to the TAC module, even though there were no driveability symptoms. If it were not for that one data PID (Cruise Inhibit histor...
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