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Prev Professional Automotive Repair Technical Discussions for March 3, 2008
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Open Help Requests for GM
Help Request Answers
1993 Cadillac Eldorado Touring 4.6L Poor Idle Quality, Misfire, BACKFIRE VIN: 1G6EL1291P
This cadillac will intermittantly on start up backfire very badly. When it does that it will misfire severly until the engine is shut down and restarted. It seems to do this more after a hot soak. I have only got it to act up once. The fuel pressure holds well...
1996 Chevrolet Cavalier 2.2L No Start VIN: 3G1JC1247T
We have a tow in no crank no start,theft light on all the time.We are trying to bypass the passlock,Does anyone know what resistance value we can use.We want to solder in a resistor so we can avoid replaceing the ign lock cyl.I have not been able to find this ...
1998 Chevrolet K1500 Cheyenne 5.7L Hesitation VIN: 1GCEK14M6W
This truck when ambient temperature is cold below -2 degrees celsius it will hesitate really bad. When I picked the truck up the other day it stalled twice just trying to get across the road. If you accelerate really slow it will take it but very slow. At high...
2000 Chevrolet Malibu 3.1L radio VIN: 1G1ND52J6Y
i have a radio that is locked up. i pulled the 2 three digit codes from the radio. they are 002 and 008. can anybody help with the unlock code? thanks, pat
2001 Chevrolet Tahoe 5.3L 4x4 VIN: 1GNEK13T51
Hello Techs. I have this 01 tahoe in here with a service 4x4 lite on and no 4x4. I checked it for codes and found code C0387 unable to perform shift. I cleared all codes and tryed to recheck but the code will not clear. I ran the diagnostics as per alldata and...
2002 Chevrolet Express 2500 5.0L Cuts out, blows fuse VIN: 1GCFG25MU2
Hi: This van keeps blowing ECM fuse B . We have checked the wiring from the fuse box to the fuel pump and it is fine. We removed the ECU and removed the case and it's internals are spotlessly clean. We checked fuse pump draw and it was 10 amps. We replaced th...
2003 Chevrolet Tahoe LT 5.3L Automatic Tranmission VIN: 1GNEC13ZX3
Hello: This has been a problem with this vehicle since it was driven off the lot. After Vehicle is up to operating Temp. and you are stopped at a red light then try to drive away it's like the vehicle is still in 4th gear. It will rev, then a hard clunk and do...
1987 Oldsmobile Cutlass Ciera Brougham 3.8L MIL Lamp on VIN: 1G3AM5137H
This car has been a real problem child. Vehicle first came in with 2 codes, one for t.p.s. and one for egr. Tested and replaced tps and tps code went away. Now onto the problem. E.G.R. valve is good and working fine. replaced egr soleniod with 3 different good... Trouble codes: 32 (e.g.r)
1994 Pontiac Bonneville SE 3.8L Surge, MIL Lamp on, no link with ecm VIN: 1G2HX52L8R
fist off thanks in advance for any help on this one. i am not the wiring guru to say the least. i know there has to be a bad connection between the obd link and the ecm because my code reader will not interface. this is where i need help. this car will set a c...
2002 Pontiac Bonneville SE 3.8L engine VIN: 1G2HX54K12
This vehicle has excessively high oil pressure. Instrument panel gage pegs at 120 PSI. Owner brought it in today for regular service and complained that it used a quart of oil in the last 5000 miles, which it never has. So, I believe the high oil pressure indi...

Fixes & Summaries for GM
Fix/Summary Answers
1998 Cadillac Eldorado ESC 4.6L Brake Pedal VIN: 1G6EL12Y5W
Thanks you for all the posts, it turned out to be the remand master cylinder was defective. Replaced it with a new master cylinder. Everything is just find. Thanks to everyone
1994 Chevrolet Lumina 3.1L Excessive Emissions VIN: 2G1WL54T8R
Thanks to everyone who responded on this vehical. Timothy from Wisconsin was on the money. Blair from missouri wrote me a book with all kinds of great information. the fix on this was the NEW injectors were defective. what we did was to clean the junk out of t...
1995 Chevrolet Caprice Classic 5.7L Poor Idle Quality, Cuts out VIN: 1G1BL52P8S
Thanks guys.Those of you that said the iac was the problem were right.I took it off and used my finger to control the air and it ran better.Thanks for the help.
1998 Chevrolet K1500 Cheyenne 5.7L Misfire
thanks for all the replies two of u suggested injectors,that was the problem.Strange the old motor didnt have a missfire but maybe during dissassemle and reassemble we did something to no1 and 5 truck runs great now thanks iatn.
1998 Chevrolet S10 2.2L MIL Lamp on VIN: 1GCCS1447W
Hey guys just wanted to say thanks for all the help !!! Everybody was all over it . The red wire from the pcm ( ignition feed wire ) Was semi- broke inside the connector at the egr valve. Repaired the wire inside the connnector and all is good . hopefully the... Trouble codes: P0404.
1998 Chevrolet C3500 Cheyenne 7.4L Poor Fuel Economy VIN: 1GBKC34J3W
1999 Chevrolet C1500 Suburban 5.7L ecm1 fuse VIN: 3GNEC16RXX
hello iATN, after reading many of your helpful emails i decided to check the injectors again. even though they all ohmed out the same one of them DID have continuity to ground!! I could not replace just one injector believe it or not because this vehicle h...
2000 Chevrolet Blazer LS 4.3L MIL Lamp on VIN: 1GNDT13W3Y
Thanks for all the replies. I ve heard of installing the valves backwards so I checked that and tried a dealer part just for good measure. Nothing changed. Some years of this truck have a TSB that suggests reflashing the PCM. Not having the ability to do thi... Trouble codes: P1404 (EGR Closed position).
2003 Chevrolet Silverado 1500 4.8L MIL Lamp on VIN: 1GCEK19V13
techs: the response to this help request was great, most all the replies were rite on . the fix ended up to be broken wire ground next to evap vent solonoid above frame rail between cab + bed drivers side . the replacement parts are new canister, evap solonoi...
2004 Chevrolet Silverado 2500 6.0L plugged VIN: 1GCHK24U14
I replaced the entire exhaust from front to back with a system removed from a 2005 with 40,000 miles. Used parts cost 560.88 vs. 1800.00
2001 GMC Yukon Denali XL 6.0L Unknown VIN: 1GKFK66UX1
Thanks to all for the replies- we had refilled the transfer case with the incorrect fluid!! Refilling with the correct "blue"" GM fluid fixed the problem. Thanks again, Greg and crew
1993 Oldsmobile Cutlass Supreme 3.1L Poor Heating VIN: 1G3WH14T3P
Thanks for all the replies. Sadly the customer has not been able to leave the vehicle with me to look at again. I've got all the notes and suggestions to check out when and if the vehicle returns. Thank you all for your time.
1988 Pontiac 6000 LE 2.8L No Start VIN: 2G2AF81W3J
well I pulled the intake plenium and checked injectors. Found 3 injectors @ 12.2ohms, 1 @ 11.3, 1 @ 10.7 and the other at 1ohm, replaced all injectors at customers request and vehical runs great.
2000 Pontiac Grand Prix SE 3.1L No Start, Stall VIN: 1G2WJ52J4Y
Thanks to all for the help. All very usefull info. Alex and Greg hit right on the nose. I replaced the theft detterent module and also the lock and key cyclinder because it was loose feeling and the key would pull out in run. Car starts and stays running ... Trouble codes: P1629.
2002 Pontiac Montana 3.4L windshield wipers VIN: 1GMDX03EX2
Ok a big thank you for all who have replied. It is fixed. I had to really examine how this works. There is a tab on the crank mechinism that was bent. I adjusted it and the wipers return to park. Thank you all again.
2001 Saturn L300 3.0L oil pressure VIN: 1G8JW54R71
Removed pump and pan, crank and lower end appeared very clean with no signs of sludge, blockage or sump issues. Replace oil pump with built in check valves (new oem unit). With the new pump, another filter and fresh synthetic, pressure is good and lifter noi...
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