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Prev Professional Automotive Repair Technical Discussions for December 20, 2004
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Open Help Requests for GM
Help Request Answers
1990 Buick LeSabre 3.8L Hesitation, Misfire VIN: 1G4HR51C8L
Hi gang, got this car from the dealer, as they couldn't fix it. I've never met a Buick I couldn't fix, but this one is opposite of others. When it came in, it was hard to start cold and would misfire at slow speeds and under light load. It has new plugs and wi...
1991 Buick Regal Custom 3.1L coolant level VIN: 2G4WB54T3M
Vehicle uses 1/2 gallon of coolant each day,30 miles driven. I have pressure tested radiator found no external leaks. Combustion leak test shows no combustion in radiator. Radiator pressure normal.Vehicle did over heat once. Smoke,steam, with antifreeze smell ...
1992 Buick Park Avenue 3.8L heater VIN: 1G4CW53L1N
hello fellow techs. this vehicle is a friends at work. it has always had really bad heat. so it came in a week ago for a coolant leak at the intake. i repaired this item but was asked to check also the lousy heat. when running with cap off you get good heat. s...
1990 Chevrolet K2500 Cheyenne 5.7L Electronic VIN: 2GCFK29K2L
Control head arrows on left side of control head display will start blinking after about 10-15 seconds. New control head installed by customer with same symptom. We disconnected the battery to see if this would clear, but same thing. A friend of mine said thes...
1991 Chevrolet Corsica LT 2.2L Misfire VIN: 1G1LT53G1M
this vehicle wiil loose spark on acceleration in park in shop. checked pins c10 c15 c16 no voltage loss checked c12 c13 ground circuit. i installed in line spark tester vehicle will loose spark under accel for 3 seconds sometimes will stay running. i replaced ...
1995 Chevrolet K1500 5.7L Poor Idle Quality, Surge, MIL Lamp on VIN: 2GCEK19KXS
Dear group, I am trying to repair this driveability problem with this truck.The vehicle came in with a minor problem of not accelerating all of the time after reaching traffic speed.If you go ahead and put the throttle down 1/2 pedal or more it will go on an ... Trouble codes: 32 (egr), 33 (map sensor low), 45 (rich ex)
1997 Chevrolet C3500 Cheyenne 6.5L No Start VIN: 1GBKC34FBV
Hello chevy diesel techs I am not much of a diesel tech so bare with me. The truck came in running and a complaint of no power and surging. I drove the truck and it cut out bucked and staggered going down the road even with a light throttle. At idle engine run... Trouble codes: P1216 (Fuel solenoid response time to short)
1999 Chevrolet Silverado 1500 5.3L MIL Lamp on VIN: 2GTEC19T0X
Vehicle came in running great, check engine light on for inspection.Codes P0171 & P0174. Cleaned injectors and MAF, cleared codes and passed drive cycle, inspected. Returned MIL on. Replaced filter, 48 PSI on fuel system. Tried MAF, no help. Replaced fuel pump... Trouble codes: 0171 (System lean bank 1), 0174 (System lean bank 2)
1999 Chevrolet Tahoe 5.7L top engine noise VIN: 1GNFK13R5X
After cold start up if sits all nite vehicle starts and OIL PRESSURE GOES TO 80 PSI. Lifters rockers make noise(clater) for approx 15 mins till warm up and then all is quiet with normal oil pressure and noise gone for remainder of day or till sitting approx. 8...
2000 Chevrolet K2500 7.4L MIL Lamp on VIN: 1GCGK24J4Y
G.M. Techs This truck has had this problem in the past with the same codes. The last time I had it the repairs were done and I ran the monitors with all passing on my Tech2.. This was over 2 months ago.. freeze frame data shows 1 failure trip on the O2s and 2... Trouble codes: P0158 (B2S2 O2 Sensor Voltage High), P0152 (B2S1 O2 Sensor Voltage High), P0132 (B1S1 O2 Sensor Voltage High), P0401 (EGR Flow Insifficient)
2001 Chevrolet Impala 3.4L Radio VIN: 2G1WF52E71
Replace the intake gaskets on the vehicle and when job finished the radio would turn on but no sound. Have checked all the fuses and wiring. Have power to the amp but still no sound from the radio. The radio shows the stations and you can change stations but n...
2003 Chevrolet Silverado 3500 6.6L overdrive VIN: 1GCJK33163
Hi guys. Truck will not shift out of overdrive on medium to heavy accelaration. Owner says he needs to stop and shut engine off to make transmission shift pLeroperly. Any help would be appreciated. Thanks, Joe
2003 Chevrolet Tahoe LS 4.8L dash VIN: 1GNEK13V53
Does anyone have any expierience with wood grain dash kits? I noticed several sites on the internet. Some offer synthetic (plastic) and others offer real wood. Any pros or cons? Are some kits better than others? Some will send a dash bezel and you send them yo...
1998 Oldsmobile Intrigue GL 3.8L gearbox VIN: 1G3WS52K1W
This vehicle was originally diagnosed with a leaking gear box. The unit was replaced with an aftermarket unit. The vehicle has returned 3 times now with same problem. The powersteering unit and fluid have been flushed. We have tried using different part suppli...
1999 Saturn SC2 1.9L No Start VIN: 1G8ZH127XX
I have a 99 Saturn here that is a no start. I have good spark, fuel pressure ok, but no injector pulse. No codes other than what I intiated when the fuel injectors where dis-connected. I believe I have a bad PCM, not pulsing the ground side of injectors. I hav...
1999 Saturn SL1 1.9L speedometer, tach VIN: 1G8ZG5280X
Looking for some Saturn advice, I got this 1999 that when you turn the key in the on position the tach needle and sometimes the speedo needle vibrate. When you shut the engine off the tach will continue to vibrate for about 5 seconds. Once you drive for a few ...

Fixes & Summaries for GM
Fix/Summary Answers
1995 Buick Riviera 3.8L compressor VIN: 1G4GD2213S
Hello everyone, I recieved many replies stating it is a faulty low pressure switch. My customer is bringing it back after the Holidays. Thanks, Steve
1996 Cadillac Seville STS 4.6L coolant leak VIN: 1G6KY5298T
I think Eric from Texas has this guessed right In which the engine block Is porous In this area of the block. I have never seen this before but It does seem to come from the middle part of the front of the block under the exhaust manifolds and frt. engine moun...
1989 Chevrolet C1500 Cheyenne 5.7L Excessive Emissions, Poor Idle Quality VIN: 2GCEC19K1K
thanks to all who replied. we just got this truck back a couple of days ago the customer needed it back for a while. we finally came to the conclusion that there could not really be any other possibility for our extremely rich condition and high idle as well. ... Trouble codes: 24 (vss circuit problem), 43 (esc circuit), 45 (system rich).
1995 Chevrolet Camaro Z28 5.7L Mechanical VIN: 2G1FP22P25
i saved a lot of time by taking it out the bottom as stated not a hard job at all
1996 Chevrolet Corsica 2.2L heater VIN: 1G1LD5546T
roy from arkansas, jerry from texas, rodney from texas, , paul from washington all hit it on the head. cant believe i didnt check this. i was very frustrated at piecing back together someones elses cob job and was fed up. i got vehicle back in today and dissas...
1997 Chevrolet K1500 5.7L Excessive Emissions, Poor Idle Quality, Surge, Misfire
Thanks for the help guys, the valve spring wasnt broken as most suggested. I had an itermittent coil with a weak spark. Trucks gone and customers happy. Trouble codes: P0300 (Random misfire).
1998 Chevrolet K3500 Cheyenne 7.4L intermittent no start, cranks good VIN: 1GTHK34J9W
Thanks everybody for the information. Removed the upper intake and found that 5 injectors for sure were leaking and some of them weren't even spraying. Replaced all 8 injectors and so far so good.
2001 Chevrolet Malibu 3.1L Poor Idle Quality, Cuts out, Stall VIN: 1G1ND52J31
Well, were gonna call this a fix. Hopefully it wont come back again. Thanks to all who replied, there was plenty of good information there. Several of you suggested pcm reflash/replacment, did reflash and seemed to fix, for a little while. Even ordered pcm fro...
1997 Pontiac Grand Am SE 3.1L starter VIN: 1G2NE52M2V
Thanks to everyone that replied. I had to replace the battery, starter, and ignitions switch, yes, all three were bad. SP tks to Craig@dcauto, Ray@boyleauto. and Steve@kasloauto. Everyone should remember that some times there is more than one problem, and to c...
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