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Prev Professional Automotive Repair Technical Discussions for May 23, 2005
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Open Help Requests for GM
Help Request Answers
1988 Buick Century Custom 2.8L Poor Idle Quality, Surge, Stall VIN: 1G4AH81W5J
This car has symptoms I've never seen before. It runs great in open loop, as soon as it goes to closed loop it starts to stumble, idle rough, surge, and stall out. unless you "pedel it" she will stall out. I don't get any codes when i try to blink them out, bu...
1996 Buick Park Avenue 3.8L dome lights VIN: 1G4CW52K4T
Dome lights don't time out in the 25sec. like their supose to. Replaced drivers door handel switch because when put in self diagnistic mode there was no recognition of that switch, all the other doors past test. Flow chart says possable remote funtion moduel o...
1983 Cadillac Seville 5.7L Poor Idle Quality VIN: 1G6AS698XE
Hello everyone, This vehicle came in about 2 weeks ago Running rough sold the customer a major tune up cap rotor wires and plugs compression tested good. The car left customer complaint about service engine light comes on when accelerating and goes off when th... Trouble codes: 52 (Power to ecm interupted)
1998 Cadillac DeVille 4.6L starter/flywheel VIN: 1G6KD54Y1W
hello again all. this one is driving me nuts. the vehicle will make an odd rattle/clanging noise only on right turns. the noise stays in neutral, but will leave if i turn off the engine on a right turn. i've found that i can reproduce the noise if i lean the c...
2001 Cadillac Seville STS 4.6L MIL Lamp on VIN: 1G6KY54931
I have an 2001 caddy that shows PO446 -- a restricted or blocked evap vent path. Pulled off all the hoses from the charcoal canister to the vent solenoid, taken apart the vent solenoid, cleaned the filter, blew air through lines from the throttle body to the c... Trouble codes: P0446
1996 Chevrolet Tahoe 5.7L Misfire, MIL Lamp on VIN: IGNEC13R4T
HI Y'ALL ! We have this Tahoe with cylinder 5 misfire. I am posting this for friend at other shop. The customer brought it to him and wanted the heads repaired, #5 cylinder misfire. After testing compression and cylinder leakage, the #5 INJECTOR AND HOSE W/ PO... Trouble codes: P0305
1996 Chevrolet Corsica 2.2L No Start VIN: 1G1LD554XT
Hello techs. This car cranks well & sounds like it is going to start. It seems to flood the cylinders easily. For all practical purposes the engine should run. I am asking if anyone knows what compression psi should be on a healthy 2.2L. This car just died whi...
1997 Chevrolet C2500 Cheyenne 5.7L MIL Lamp on, Long Crank In AM VIN: 1GCGC29R8V
Customer Came in complaining of long crank in AM and MIL Light will stay on for 2 hours in AM Only. Scan System and Pulled Code P1351. Test for fuel pressure. Fuel Pressure was good. There was no fuel under intake to indicate problem with Regulator. We did fin... Trouble codes: P1351 (Igntion Control Circuit High Voltage)
1998 Chevrolet K3500 Cheyenne 7.4L starter drag VIN: 1GCHK33R4W
Customer installed a GM crate motor. Brought it to me with a code p1345. I retimed the distributor correctly and the code is now gone. I also set the cam timing with my scanner to -1 degrees. The truck still drags when starting like the timing is very high (ne...
1999 Chevrolet Cavalier 2.2L Surge VIN: 1G1JC124XX
Hi techs, this is my brother-in-laws car and it is giving me fits. While driving at highway speeds it will sort of surge. What it feels like is getting hit by a stong headwind. It doesn't do it all the time. You can drive it for miles and never do it. There ar...
2001 Chevrolet Silverado 1500 4.8L No Start
Hi to all.This chev is giving us a headache.Approximatly every 5 key cycles we get a crank/no go.Whats missing is spark.No codes logged and normal scan data except that when it acts up the crank rpm hits and stays at 12000.This didnt seem right to me so on wen...
1998 Saturn badge_gone 1.9L Hesitation, Surge VIN: 1GBZG1278W
Hello to Saturn Techs, - This one is a bit out of our line, since we usually do Jaguars & Rovers. We have here a 1998 2-door Saturn, which bucks most annoyingly at part throttle, has reasonable power at higher throttle ranges, and which returns trouble codes P... Trouble codes: P0463 (1599 -), 1599 (1620 - learn fault), 1620 (learn fault), 1624 (tcm-ecm)

Fixes & Summaries for GM
Fix/Summary Answers
1992 Buick LeSabre Limited 3.8L Stall VIN: 1G4HR53L1N
Thank you everyone for taking the time to offer suggestions and advice. Unfortunatley the customer has elected to get rid of the car and not persue any further diagnosis. I wish I could have figured it out but I couldn't afford to loose any more time on it wit...
1992 Buick Regal 3.1L No Start
hello my fellow techs, I have not completed this vehicle,there were many good suggestions and I have gone thru almost all of them, i have gotten so busy with alot of electrical work and must close this one out as time has ran out on me. When i get more time i ...
1993 Buick Park Avenue Ultra 3.8L Poor Idle Quality, Hesitation, Stall VIN: 1G4CU5318P
OK I sent this down the road and was waiting to see if he came back with it for any more.It was a combo of problems.First,although I failed to mention it I had tested fuel pressure itwas 39 psi,spec was 41.A little low,but not the problem.The ecm was funky,I w...
1997 Cadillac Eldorado 4.6L Electronic VIN: 1G6EL12Y3V
Thanks for all the responses. I am sorry that it took so long to close this one. Customer has not been back and have not heard from them, so I can only assume that it is working properly. Low temp sensor was the most common answer and I suspect that is correct...
1999 Chevrolet Cavalier 2.2L Front Brakes VIN: 1G1JC1249X
To All Who Helped, Thanks for the quick replies! What ended up fixing this one was putting on a set of acdelco shoes and turning the drums. I found out from the customer that after they had another shop that specializes in brakes and is nationwide replace th...
1999 Chevrolet K2500 7.4L Poor Idle Quality, Stall VIN: 1GCGK23J1X
Thanks for the replies on this. The IAC would extend but not retract. After further investigation found that there was an open wire between the pcm and iac. Located the wire near the intake manifold and repaired. Works great now. Thanks again
2000 Chevrolet Suburban 2500 LT 6.0L abs module, warning lamps VIN: 3GNGK26U0Y
We found ground G110 Was faulty and at certian times when the body and frame would flex we would loose the frame ground, which is where the ABS system picked up it's ground, and therefore would cause a feed back through other systems. Our fix for this problem,...
2000 Chevrolet Silverado 1500 5.3L Window VIN: 2GCEC19T1Y
On this one we replaced the circuit breaker/switch assembly and that fixed the problem. Thanks guys for responding on this one.
2001 Chevrolet Silverado 1500 5.3L reciprocating parts VIN: 2GCEK19T71
Thanks for all the ideas. There is a lot of common problems on these engines based on what you all said. The leading responses were, carbon knock, piston rattle, and lifter noise. I was hoping for more of a 'oh they always do this' response but apparently ther...
2002 Chevrolet Impala 3.8L warning ligh VIN: 2G1WF55K92
Thankyou all for the info. although we have not made the repair it loods like the BCM is the problem.
2003 Chevrolet Cavalier LS 2.2L cooling fan&ETS control VIN: 1G1JF52F73
Thanks to all that replied. Gene [...] both said to check the grounds by the battery cable. I looked at it at first but missed it. I was looking for a seperated ground cable , it turned out to be a metal bracket that is made on the negative...
1997 Pontiac Grand Am SE 2.4L Trans slip VIN: 1G2NE12T0V
Thanks to all for your input. There is a disagreement as to Transgo kits vs Sonnax valve body repair kits. We have had good luck with both in the past. Michael from Washington summed things up with 'Transgo seems to try to compensate for valve body wear while ...
2001 Saturn L300 3.0L Lighting VIN: 1G8JW52RX1
I would like to thank the three people that responded to our help request. It did have a badf BCM. We replaced to fix. That is what we thought it was from the beginning and it was nice to get the responses back with other techs saying the same thing. It was re...
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