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Prev Professional Automotive Repair Technical Discussions for October 11, 2006
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Open Help Requests for GM
Help Request Answers
1995 Buick LeSabre Custom 3.8L charge system VIN: 1G4HP52L7S
This vehicle has a cs alternator. It came in two weeks ago on my day off. The technician inspected the charging system, replaced the alternator with a non-factory reman. The vehicle appeared to charge normally and was returned to the customer. It came back yes...
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1997 Cadillac DeVille 4.6L dies at times VIN: 1G6KD54Y3V
customer complaint is that is dies at times with no warning and at anytime like idling in gear or driving down the highway. it was in about two weeks ago and we drove it and when it died we lost fuel pressure and replace fuel pump and reflashed compuiter for p... Trouble codes: P0603 (pcm keep alive memory), P0741 (tcc perf or stuck off), P1599 (cc power mgmt mode or engine stall), P1630 (theft learn mode or system volt error), U1016 (loss of pcm communication), U1040 (loss of ebcm/ebtcm comm)
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1998 Cadillac DeVille d'Elegance 4.6L Stall VIN: 1G6KE54Y1W
Thanks for your time in reading this. Customer concerns are a stall on decell or at stop lights, he states it usually happens while driving below 40 mph. I have not been able to reproduce the concerns. I initiall replaced the crank sensors and fuel pressure re... Trouble codes: P1599
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1998 Cadillac DeVille d'Elegance 4.6L message center VIN: 1G6KE54Y1W
another shop which i help out has this cad which on the message center says to service the charge system went thru the archives and checked the previous repairs that were listed. even with the charge system not dropping below 13.2 volts it still says to servic...
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1985 Chevrolet C10 Custom 6.2L Engine leaks oil VIN: 2GTEC14C2F
Hi group, I have this 6.2 diesel and there is a lot of oil behind the engine. It seems to run down and get on the exhaust pipes and leak from there. I thought the rear main was leaking and spraying around, but I ran it on the hoist with the convertor cover off...
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1989 Chevrolet Corvette 5.7L Disc Brake system VIN: 1GIYY3181K
I hope there are some Corvette techs out there. This one was dropped in my lap a couple of days ago. Problem is vehicle will not stop without excessive pedal effort. It acted like a bad booster but without the tell tale hard pedal. I checked the vacuum supply ...
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1990 Chevrolet Lumina 3.1L Hesitation VIN: 2G1WL51T3L
On this car it came in with a complaint of a tip in hesitation when cold. I have monitored tps, coolant temp and map sensor. I have chaned the prob that is for that complaint but i am still having a issue.
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1991 Chevrolet Astro CL 4.3L Poor Idle Quality, Hesitation, Cuts out VIN: 1GNDM15Z1M
THIS VEHICLE IS A REAL PUZZLER I THINK IT HAS A DEMON IN IT OR SOMETHING THE PROBLEM IS SO INTERMITTENT. iT HAS NOTHING TO DO WITH DRIVING CONDITION,WEATHER ETC.WHEN YOUR DRIVING ALONG IT WILL JUST FALLS ON ITS FACE LIKE ITS RUNNING OUT OF FUEL. WHEN IT FIRST ... Trouble codes: 13 (o2 sensor short/bad), 33 (map sensor circuit high)
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1991 Chevrolet Lumina 3.1L Hesitation VIN: 2G1WL54T7M
Hi everyone, this car exibits a tip in hesitation, most noticeably felt from light accel from stop or rolling stop. feels just like bad tps but scoped tps and is working perfect, tried known good map as well, no vacuum leaks and fuel system pressure/volume all...
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1995 Chevrolet Astro CL 4.3L Excessive Emissions, Surge VIN: 1GNDM19W8S
Vehicle was parked for about a year. Drained fuel, added premium fuel and inj. cleaner. Changed oil and filter.Failed Etest badly [3 1/2 times allowable hc at idle and almost 6 times allowable co] Runs very rich cold not too bad warmed up. Watching ign advance...
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1999 Chevrolet S10 2.2L No Start, Cuts out, Stall VIN: 1GCCS1442X
truck came in running rough and we found cylinder #4 dead due to #4 injector driver faulty and causing constant power to injector and flooding cylinder with fuel, we then replaced the pcm with a used one from salavge yard. tryed starting vehicle and it would s... Trouble codes: U016, P629
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2001 Chevrolet Blazer LS 4.3L MIL Lamp on VIN: 1GNDT13WO1
I have little diagnostics aids for this suv i smoked vacumn system under hood and found 2 split hoses near lf fender rear spring and replaced then customer returned in about 140 miles i replaced selinoid on firewall with known good part from another blazer sam... Trouble codes: P0440
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1996 GMC K1500 Sierra SL 4.3L no start VIN: 1GTEK14W8T
Vehicle was towed to my shop from customers yard,no start cranks strong,has lots of fuel pressure and flow, pressure measures 55-62 #'s of pressure.Exhibits no trouble codes.Coil produces good arc at the plugs , tried to unplug the mass air flow doesn't do any...
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2000 GMC Yukon Denali 5.7L Starting VIN: 1GKEK63R9Y
ive got this yukon came in with dead battery replaced ran fine came back no start another tech cleaned and tightend battery termanals ran fine back today no start customer said he had starter put in last month when turning ign starter clicks no start i found b...
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2000 GMC Yukon SLT 5.3L transfer case VIN: 1GKEK13T5Y
sorry we do not do alot of transfer case work so this may be a stupid ? customer came in with a load clunk in transfer case when going from park to drive or reverse also in 2nd and 3rd gear while driving. he had afetr market warrenty coverage so they approved ...
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2000 Oldsmobile Intrigue GLS 3.5L Starter VIN: 1G3WX52H6Y
This Intrigue has been plagueing are shop since before i started working here. In the past previous tech about a year and half ago replaced pass lock cyc and key. Vehicle had intermittent no start and pass lock codes. Vehicle came back 6 months later no start ...
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1991 Pontiac 6000 LE 3.1L No Start, Stall, START AND STALL VIN: 1G2AE84T1M
HELLO FELLOW TECHS I HAVE A 10-91 PONTIAC 6000LE. IT HAS THE 3.1L V-6. THE CUSTOMER BROUGHT IT IN FOR A STALL PROBLEM. OUR FIRST TECH CHECKED SOME THINGS OUT ON IT A RECOMMENDED REPLACING THE CRANK SENSOR AND MAP SENSOR. THE CUSTOMER BROUGHT IT BACK IN THE NEX...
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1998 Pontiac Grand Prix GTP 3.8L trac light VIN: 1G2WP1212W
this car has trac light on and no tach. wiring good and i have square wave on tach output and to cluster and ebtcm. i cant make the tach jump when i stick cir. 121 off and on ground. i have code c0236. no ohter complaints tach moves when key powered up. not cl...
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Fixes & Summaries for GM
Fix/Summary Answers
1990 Buick Regal Limited 3.8L MIL Lamp on VIN: 2G4WD14L9L
The final cure for this vehicle was to go thru each wire in the harness from the ignition module to the multi connector at the back of the engine. On the engine side of the multi connector I found a wire which had been melted but not all the way thru. At times... Trouble codes: 42 (est).
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1989 Cadillac DeVille 4.5L Stall VIN: 1G6CD5152K
sorry i have not replied.. I have let the customer take the car home it runs great just the timing is off. I will let you all know something if i get it back again Thank you all agian...
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1990 Chevrolet G10 Sportvan 4.3L Hesitation VIN: 1GNDG15ZXL
well this van is finally fixed. jim from new jersey had it correct. when i removed the fuel return line from the tbi unit i had very little fuel flowing during the prime cycle. the problem was that there is a rubber section of hose right near the transmission ...
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1995 Chevrolet C3500 Cheyenne 7.4L Poor Idle Quality, Hesitation, Surge VIN: 1GBKC34N4S
Well this beast is fixed! It ended up being a poor ground at the 1 wire o2 sensor going into the exhaust. Who would ever think that this could be a bad ground spot!. - We installed an old gm design 2 wire o2 sensor & ran a seperate ground wire to the block(Jus...
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1996 Chevrolet Astro 4.3L Surge, Misfire, fish bite VIN: 1GNDM19W2T
Thanks to all who replyed Amin from BC suggest the MAF may be defective but no change noted when unpluged. Roger from Alberta ofered the posibility that the distributor shaft may be worn. Inspection showed no damage The cam offset is fixed on this vehicle and ...
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1998 Chevrolet Venture 3.4L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GNDX03E4W
I did as many of you said. I checked the compression and found that to be good. I changed the coil pack with one I had at the shop that I knew was good and it still had a misfire on #6. So I knew the air & fire was right so that only left the fuel. I could hea... Trouble codes: P0306.
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2002 Chevrolet Silverado 2500 6.0L MIL Lamp on VIN: 1GCHK29U02
i want to thank you for your patience with this fix,this pickup belongs construction co and we had to wait for rain to get it back in shop. the p0157 code is bank 2s2 stays lean. we dropped the converter today to check rich's and joseph's idea about converter ... Trouble codes: P0157 (b2b2).
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2005 Chevrolet Tahoe LS 5.3L Transfer Case VIN: 1GNEK13T05
Wish I could tell you it was fixed but we opted to send him to the dealer since he wasn't to eager to spend what it was going to take to properly diagnose it and we weren't sure that it would'nt involve re-programming the moduales. What I did learn from the 7 ...
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1996 Pontiac Firebird 3.8L Misfire, Poor Fuel Economy VIN: 10TU67O568
hey,thanks. everyones input on this one was worth it i checked everything and everything on this was bad ,changed plugs wires, cleaned mass senor with mass cleaner.cleaned throttle body ,cleared codes ran about 36 miles run perfect and no light agian thanks gu... Trouble codes: P300.
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