× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for June 1, 2004
International Automotive Technicians' Network (iATN) - Members Only
(Also Available: All, Asian, Chrysler, European, Ford, GM.)
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.

Open Help Requests for GM
Help Request Answers
1991 Buick Park Avenue 3.8L Blower VIN: 1G4CW53L6M
This car has Manual Climate Control system. The owner says that with AC on the blower stops working for as much as 5 mins. The blower never stops working when heat is on. I mainly only work on Nissan's so this is a strange problem to me. I have done checks tha...
1990 Cadillac DeVille 4.5L Poor Idle Quality VIN: 1G6CD5332L
customer came in complaining about rough idling with check engine light on.retrieve the code and found code 30 which is the idle speed control motor circuit malfunction. the engine runs rough only when check engine light is on. but when there's no check engine... Trouble codes: 30 (idle speed control motor)
1970 Chevrolet camaro ss 350CID need tune up
hi group, have this old camaro, I need the dwell angle data for a tune up, can someone help me on this one, our data books or mitchell is so recent for this one. Thanks a lot.
1988 Chevrolet Celebrity 2.8L No Start, Stall, MIL Lamp on VIN: 1G1AW51WXJ
Vehicle came in dying and no start. Started up and drove into shop. Let run about 10 min. and vehicle died. noticed that at time vehicle died fan would run on and off and fan relay was clicking erratically. after sitting for a short time. 10 min. approx. vehic... Trouble codes: 64 (MAP sensor Voltage Low), 65 (na), 66 (na)
1992 Chevrolet Lumina 3.1L No Start VIN: 2G1WL54T1N
car came in as a no-start. found good spark, fuel pressure, injector pulse, has no codes stored and has good cranking rpm on scanner. we have 150 psi of compression across cylinders 2,4, & 6. we have 30 psi on #1 90 psi on #3 & 40 psi on #5 i discussed this wi...
1995 Chevrolet Astro 4.3L Misfire VIN: 1GKDM19W3S
Van came in with rough running complaint.Felt dead cyl.right away.Put on scope and found #4 cylinder dead.Good ignition pattern,no high or low firing lines.Put in a new plug,still dead.Lots of spark at #4 cylinder.Installed test wire(still dead)did a running c...
1998 Chevrolet K3500 Cheyenne 6.5L Excessive Emissions, Misfire VIN: 1GTHK33F6W
This truck was towed to me. When the truck got here It started right up for me, but it was smoking like mad and it was missing on one or more cylinders. I scaned it and had multiple code for misfire on cylinders 1,3,5 and 6. I cleared the codes and ran it agai... Trouble codes: P0304 (missfire cylinder 4)
1998 Chevrolet Prizm 1.8L MIL Lamp on VIN: 1Y1SK5280W
P0441- Toyota and Chevy Techs please check this out... Came in with P0446 and P0441. Replaced canister assembly. Cleaned out the 2 lines (purge valve and air filter to canister) Came back two days later with P0441. Replaced purge VSV. Two days later... P0441. ... Trouble codes: P0441
2000 Chevrolet Prizm 1.8L MIL Lamp on VIN: 1Y15K5284Y
Looking for some help for this Prizm. Last week it was in for an evap code. I went through the All-Data trouble diagnostics for this code and it came to the finalization of replacing the fuel tank pressure sensor. I did and the light is back on. Has anyone com... Trouble codes: P0440
2000 Chevrolet Silverado 1500 5.3L Long Hard Start VIN: 1GCEK19T3Y
Customer brought vehicle into shop with complaint of hard starting after vehicle hot soak and then let sit for 10 minutes. We were able to recreate problem. We replaced the fuel filter and cleaned the injectors per the GM bulletin. Customer came to get vehicl...
2002 Chevrolet Suburban 1500 LT 5.3L MIL Lamp on VIN: 3GNFK16T62
Hi guys, I have this Chevy that has this various DTCs, listed below. Transmission goes to a safe mode and moves in 3rd gear seems like. Check engine light on. Also customer says that the instrument gauges and speedometer would not work intermittently while dr... Trouble codes: P0740 (Converter clutch system problem), P0753 (Shift Solenoid A circuit fault), P0758 (Shift solenoid B circuit), P0785 (3rd and 2nd shift sloleniod), P1860 (Torque converter clutch pulse width modulation)
1988 GMC C2500 Sierra 5.7L Poor Idle Quality, Surge, Cuts out, LACKS POWER VIN: 2DTFC29K9J
customer complains of intermittent sudden lack of power. cannot exceed 30 kmh. i have not been able to duplicate problem. also complians of stumble/ misfire. problem occurs mostly in gear just off idle, but can also occur at higher loads. tested all basics wit...
1991 GMC K2500 Sierra SLE 6.2L Unknown VIN: 1GTGK24J8M
truck has a clunk noise. happens at random, usually on light acceleration or deccel.sometimmes whole truck jerks. we lubed both driveshaft splines, inspected all u-joints,motor mounts & tightened all nuts & bolts. sounds like driveshaft clunk.another shop rebu...
2004 Other GM ADMIRAL SE 8.1L No Start, Poor Idle Quality, Cuts out, Stall, MIL Lamp on VIN: 5B4LP57G73
HOPE THERE IS AN RV TECH OUT THERE WHO CAN HELP.This is my personal vehicle.It has been running great until this past Memorial weekend.After driving for 2 hours with no problem,as we pulled into campsite at idle,vehicle felt as if" loading up "then shut down.B...
1989 Pontiac Firebird 5.0L Poor Idle Quality, Surge, Misfire VIN: 1235467F9K
This car runs rough at idle,cold or warm.Misfire on light aceleration.Surges at idle. Compresion is ok 130psi all cyl. no vacuum leaks found.fuel pressure at specs 39 psi at idle.egr system ok.It happens with the egr disable also.Thank you in advance.

Fixes & Summaries for GM
Fix/Summary Answers
1991 Buick Regal Custom 3.1L No Start, Poor Idle Quality, Hesitation, Surge, Cuts out, Stall VIN: 2G4WB54T2M
problem not fixed could not find any thing wrong with the car would just intermittly stall after driving returned car to owner sorry for no good news.
1993 Buick Century Custom 3.3L power door locks VIN: 1G4AG55M5R
Thank you for all your replies. Everyone said that the lock actuator was bad. We replaced the drivers front door actuator (quite rusty) and will hope for the best since the problem only seems to happen once every 3 months or so.
1996 Cadillac DeVille 4.6L Misfire, MIL Lamp on, Misfires at cold sta VIN: 1G6KD52YXT
Thanks to everyone who responded to my request for help. My problem was a miss for about a minute at cold start up. I have sold my business and retired. This is a shade tree job. I donot have access to the diagnostic equipment, tools and information that I onc... Trouble codes: P0300 (Multiple misfires).
1997 Cadillac Catera 3.0L engine VIN: W06VR54R7V
Thanks to all. I got 11 replies covering this problem and they really helped. The main problem, biggest leak, was the oil cooler line banjo fitting at the rear of the engine. This was leaking pretty bad and was not the easiest to get to. The valve covers w...
1998 Cadillac Seville STS 4.6L programing failure VIN: 1G6KY5490W
I guess this can be called a learning experiance. This is kind of a long response, but try to read to the end. It might help. I got 12 replies concerning this issue. It seems this has happened to more than a few other people also. The bottom line is that i...
1988 Chevrolet Camaro Iroc-Z 5.7L Poor Idle Quality VIN: 1G1FP2182J
Hello sorry for the delay.#1 the block learn was 158 if i add propane the vehicle ran great and the numbers dropped. now tighten all intake bolts ,found antifreeze leaking at the back of mainfold. road test vehicle and car died .fuel pump crapped out .replaced... Trouble codes: 34 (MAF low).
1989 Chevrolet Camaro Iroc-Z 5.0L ac VIN: 1G1FP21E1K
WOW-- You guys came thru again. Over twenty replies-Most of them I had already looked at such as heater shut off valve, blend door or blend door ajustment, checking for air or contaminated refrigerant, charge issues, and yes, I learned you can have a defective...
1995 Chevrolet Cavalier 2.2L Excessive Emissions, Poor Idle Quality, Poor Fuel Economy VIN: 3G1JC1246S
hi guys I never really got this one fixed to my liking.I removed the intake and replaced tyhe gasket with a thicker Felpro gasket . I replaced the egr gasket and the housing gasket .But they appeared in good shape when i removed them.I rechecked all my sensors...
1999 Chevrolet Blazer 4.3L MIL Lamp on VIN: 1GNCS13W2X
the problem ended up being an ignition switch.Although a voltage drop was never observed,I changed the switch at the customers request.I've heard no more news. Trouble codes: 135 (b1s1 O2 heater), 155 (b2s1 O2 heater), 147 (b1s3 O2 heater).
2000 Chevrolet Tracker 2.0L oil leak VIN: 2CNBJ13C0Y
Engine had a few oil leaks , 1st time transmission was out I only replaced the rear main seal. Second time I relpaced seal again in addition to block plug gasket and crank sensor oring. Both 2nd and 3rd time I removed flex plate bolts I noticed excessive oil c...
1998 Saturn SL2 1.9L warning lamp VIN: 1G8ZK5270W
We had delivered this Saturn to the customer after we sent it to the dealer to have the keyless entry option loaded into the P.C.M We were about to close this request when the vehicle came back with the same issue. We did a relean on it , knocked out the l...
Prev (Also Available: All, Asian, Chrysler, European, Ford, GM.) Next