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Prev Professional Automotive Repair Technical Discussions for May 10, 2004
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Open Help Requests for GM
Help Request Answers
1988 Buick Skylark Custom 3.0L Excessive Emissions, Poor Idle Quality, Misfire VIN: 1G4NJ14L0J
This car failed its smog test. I found a hard ripple during crosscount on Os sensor. Ignition pattern look normal. Killing cyl had same effect on all cyl except 2&6. Based on experience I supposed that I had poor injector spray or carbon buildup on 2&6. Normal...
1993 Buick LeSabre Limited 3.8L abs codes VIN: 1G4HR53L9P
This vehicle came in with a broken front LF brake hose. After inspected all the brake lines and hoses I ended up replacing both front rubber brake flex hoses. The protion valve was rest an brake were bled. The pedal is low and the ABS light came on. There are ...
1994 Buick Century Special 2.2L gauges fuse VIN: 1G4AG5545R
I'm not looking for magical answers. I don't see any wires broken, or any aftermarket installations on this vehicle. A little old lady drives this and suddenly this fuse starts to blow. The only history I have is that the alternator was replaced a month before...
1994 Buick Century Special 3.1L Oil in system VIN: 1G4AG55M2R
Hey techs, I have a 3.1 here with the cooling system full of engine oil. Car is not equiped with a oil cooler and I am looking for ideas of where it might be coming from. It runs great no missfires but does set an egr code every 1000 miles. Please help Thanks ...
1989 Chevrolet Corvette 5.7L Poor Idle Quality VIN: 1G1YY2180K
Hi all you fellow tech's.I have a problem with the idle quality of this vehicle.There are no fault codes. I need to know where the pcm is situated and if possible a wiring diagram for the fuel injection system.We have the Bosch ESITRONIC program but there is l...
1991 Chevrolet Cavalier RS 2.2L Speedometer VIN: 1G1JC54G6M
Vehicle speedometer will register only up to 13mph then stays there no matter how fast vehicle is moving,with scanner reading vehicle speed the reading is the same.proformed test on vss with vantage and all tests pass. replaced ecm with no help- did use old pr...
1993 Chevrolet K1500 Cheyenne 5.7L system pressures VIN: 2GCEK19K6P
Thanks for you help, One of my techs retrofitted this vehicle to r134a after the clutch on the compressor burnt itself up. Since, the system blows cold and cycles on and off at the right pressures, but cycles too often. Every 5-15 seconds at idle on a 70 degr...
1993 Chevrolet C2500 Cheyenne 5.7L MIL Lamp on VIN: 2GCFC29K1P
This vehicle shows a code for the knock sensor...sometimes just by turning the key on. The engine can be cold or hot. On some occasions it has to be driven for a few minutes before the MIL comes on. We have replaced the knock sensor & the ECM. We have installe...
1995 Chevrolet Blazer 4.3L no communication VIN: 1GNCS13W1S
Connected to Genysis Scanner and were unable to communicate with vehicle. Compared wiring diagram of ALDL connector of vehicle to that in Mitchell, the serial data line is different than that shown in Mitchell. Is it a problem because this was the first model ...
1998 Chevrolet Tahoe LS 5.7L Poor Idle Quality, Cuts out, Misfire VIN: 1GNEK13R7W
Gentlemen, We have a 98 Tahoe with a very intermittent problem. It will run fine, then without any warning start to misfire, shake, ping, cough, loses power, and sometimes stall out. Originally this only occurred when you went over a serious bump, but last wee...
1999 Chevrolet K1500 Suburban 5.7L interior lights VIN: 3GNFK16R6X
dome lights come on randomly. It can happen driving down the road or it can be parked in the driveway over night. Of coarse when it happens while parked for a while, the battery will run down. I suspect a interior light modual or a remote control receiver. I d...
2001 Chevrolet Silverado 3500 8.1L no gear VIN: 1GCJC39G11
comes from local ccar lot blew trans cooling line on test drive, sent line to local hyd shop and had line repaired, now trans frt. pump wines all the time and only will pick-up gear for about 1 minute, then goes into neutral. this truck has the allison transmi...
1998 Pontiac Trans Sport 3.4L Electronic
Hello, Hope everyone took care of the Mom on mothers day, I am working on my father-in-laws trans sport mini van, He states that when coming to a stop the van downshifts once or twice after stopped. I scanned the vehicle and drove with the tech 2 and nothing h...
2001 Pontiac Grand Am SE 3.4L No Start VIN: 1G2NF52E61
Hello all customer of mine has installed the engine from this grand am in his fiero bodied solo car-he has install the original controller from the engine donor car-with all the wiring which he thought was necessary-I told him that it should run ok if he con...

Fixes & Summaries for GM
Fix/Summary Answers
1990 Buick Electra Park Avenue 3.8L MIL Lamp on VIN: 1G4CW54C5L
After receiving 6 replies, (thank you everyone), the first thing we tried was pressure testing the exhaust. A couple of replies suggested that high exhaust back pressure would hold the valve open and set the code. I'm not sure why that would set the code, beca... Trouble codes: 65 (Large Orifice EGR Solenoid Failure).
1992 Buick LeSabre Custom 3.8L abs module VIN: 1G4HP5316N
thanks for the help.the wheel speed sensor was the cause of all 3 codes.
1992 Cadillac DeVille 4.9L compressor clutch VIN: 1G6CD52B6N
The vehicle is fixed. I got Delco involved and they are taking the clutch coil back and are going to check it out and see if they can find the failure reason. The vehicle has cold A/C and fuse 5 is no longer blowing. But the cause of the coil failures is still...
1990 Chevrolet Corvette 5.7L Hesitation VIN: 1G1YY3387L
Well Group, This one was simpler than I thought. I got 5 replies and all mentioned exhaust restriction in catalyst...Sure enough the cat was blocked...Thanx Deke,Paul, Dan,and Stephen and anyone I could have missed for their help. You Guys are the greatest. Be...
1995 Chevrolet K2500 Cheyenne 5.7L Air Doors VIN: 1GCFK29K4S
Hi everyone: I received 9 replies and I try to always thank you personaly if I missed someone please fogive me. Most replies talked about motor under dash right side of gas pedal, next was vac line going though fire wall. I checked these first all looked good....
1995 Chevrolet K2500 Cheyenne 5.7L rear drum brakes VIN: 1GCGK24K2S
Hi, we finally got these brakes quiet. First of all, let me say that a lot of people suggested cleaning and lubing the backing plates. I assumed everybody did this during normal brake service so didn't mention that we did. Tried a few things suggested like cha...
1995 Chevrolet Blazer 4.3L rear shoes VIN: 1GNCT18W4S
Most of the replies covered basics such as front shoe on back or dirty shoes , weak front brakes, junk parts, we inspected these before post and set the customer up to return at a more convinant time for his wife .they have now missed 2 appointments.Today I sp...
1995 Chevrolet Impala SS 5.7L Poor Idle Quality VIN: 1G1BL52PXS
well got some replies and thanks for them it turend out to be that the chevy place did not put the wires back in the fuse block they replaced the inj was geting a sig ment for the fan controls it was long and a litle hard but it is fixed thanks for the help ... Trouble codes: 18 (injecter circit does not set mil).
1996 Oldsmobile Cutlass Ciera 3.1L MIL Lamp on VIN: 1G3AJ55MXT
Thanks to all who replied. You guys are the greatest! The PCM that was in the car originally did not have a knock module in it and I didn't know that there was supposed to be one there. I installed a knock module and road tested, all is well. Thanks again. Trouble codes: P0325.
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