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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for September 30, 2004
International Automotive Technicians' Network (iATN) - Members Only
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Open Help Requests for GM
Help Request Answers
1988 Cadillac Allante 4.1L No Crank VIN: 1G6VR3174J
This vehicle had an intermittent starting issue that has been haunting this car for some time. The vehicle recently stranded the owner and of course it was brought to me for what I was hoping to be a simple repair. Of course the simple ones always turn out the...
1988 Cadillac DeVille 4.5L Excessive Emissions VIN: 1G6C05153J
This car has been brought in several times for what the customer describes as a missfire. I have checked spark, computer sensors and fuel pressure and volume. Yesterday the customer was bringing the car over the mountains and the car started missfiring then th...
1993 Cadillac DeVille 4.9L fuse in relay box under glove box labeled ERLS VIN: 1G6CD53B2P
Keeps popping 15a ERLS fuse under glove box in relay center, after installing breaker in place of fuse customer drove to NY and back, ok all the way up, had customer well informed before trip and he narrowed it down to ..1/2 way back breaker kept tripping only...
1993 Cadillac Eldorado 4.9L Misfire VIN: 1G6EL1ZB9P
1994 Cadillac Fleetwood 5.7L No Start, Poor Idle Quality, Cuts out, Stall, Misfire, MIL Lamp on VIN: 1GDW52PXRR
Vehicle has been in multiple times with opti-spark failure. We have replaced it twice with new a/c delco units.Have also replaced wiring harness to distributor. Vehicle will stay gone three to four weeks and return with possible no start and or miss with opti-... Trouble codes: 36 (Opti-spark high resolution pulse)
1997 Cadillac Catera 3.0L Blend door ? VIN: W06VR52R1V
I don't know if anyone could help me with this on.This car has no heat.Everything works but the heat.I have checked the heater hoses and both hoses are hot.I cannot get into the computer to check the system.I was hoping that someone has had this same problem.a...
1986 Chevrolet Caprice 4.3L smoking computers
i need a prom for this vehicle 1986 chev caprice 4.3 v6 vin z.external prom id is hwn/[...].
1990 Chevrolet Corvette 5.7L day time running lights VIN: 1G1YY338XL
this car was brought over from the u.s., to canada and day time running lamps must be installed, customer wants the headlights to flip automaticaly when vehicle is started, (does not want to go through park lights as i recomended), gm was not helpfull at all t...
1995 Chevrolet S10 2.2L temp gauge VIN: 1GCC51948S
this truck came in with mud in radiator a year ago and heater core was stopped up. we did a double chem power flush and got it cleaned up some what. it came in a week ago for a leak at the head gasket so we replaced just about every thing but the w/pump. the h...
2001 Chevrolet Silverado 2500 HD 6.0L turn signals
this vehicle has turn signals that flash very fast. have tried almost everything ,but if you remove all the bulbs the flasher works at a normal speed.has anyone ran into this before?
2001 Chevrolet Silverado 2500 HD 6.6L fuel guage jumps
this is my brothers truck baught it new and has never had a problem until now -- only when you fill the gas tank too top will when driving fuel gauage will drop until low fuel light displays and then will after 15 seconds go to normal reading then will drop ag...
1994 GMC Safari SLE 4.3L start VIN: 1GKEL19W8R
vehicle starts right away when cold, running to engine temp. shut off for 1/2 hour try to restart has prolonged cranking before engine will start. vehicle has had a complete tune up and fuel pump installed, cat. converter was plugged and replaced as well as id...
1994 GMC Sonoma SLE 4.3L Cuts out, Stall VIN: 1GTDT19W6R
Replaced injector assembly problem goes away,for week or two,when returns gradually get worse.Scanner show everything norm values until problem starts O2 starts going lean Fuel trim does same
1999 GMC K3500 Sierra SL 6.5L engine losing coolant VIN: 1GDHK33F5X
recently within past month cust notice he had to add coolant to res, due to low coolant light came on. within that time frame cust has added appox 2 gallon of coolant since this occured. cust vech never overheats just lamp comes on and he adds about half gallo...
1995 Oldsmobile 88 Royale LS 3.8L heat control VIN: 1G3HY52K0S
Hello Group, First time customer brought in this Olds with climate control. On the heater its full heat at 90 degrees and full cold backed down to 85 degrees , there's no in between. The A/C seems to be working normally. This is a CJ2 option, also the outside ...
1999 Oldsmobile Silhouette Premiere 3.4L power sliding door VIN: 1GHDX03E3X
Hello everyone... We had this van in 2 years ago for a similar problem...back then the door would open by remote ,then when closing it would close then open and stay open...we corrected this problem by re-initializing the door... Now the door won't open at all...
2002 Oldsmobile Silhouette Premiere 3.4L Differential VIN: 1GHDV13EX2
Customer has this Olds Silhouette with the Versatrak AWD. On turns going into a driveway or a 90 degree parking turn the rear differential makes a whining noise, similar to a power steering whine, only while turning. Dealership is giving her stories about impr...
1999 Saturn SC2 1.9L Poor Idle Quality VIN: 1G8ZG1272X
Posting for another shop that is not in IATN. They have a Saturn that is being stored for a soldier who is over seas. The vehicle has been sitting for several months (unsure exactly how long)but is started about 3 times a week. This vehicle exibited signs of ...
1999 Saturn SL1 1.9L parking pawl VIN: 1GAZK527XX
When car is shifted from reverse to park, a noise coming from the parking pawl until engagement, up to ten second delay until it engages. Going from neutral to park same noise with delay. Going from drive to park no noise, pawl works correctly!

Fixes & Summaries for GM
Fix/Summary Answers
1991 Buick Regal Gran Sport 3.8L a/c, tcc, evap, cooling fans VIN: 2G4WD54LXM
sorry for the delay in posting i thought i had already done that. thanks for all 5 of the replies. some suggested to check alt. wiring for problems. another asked which fuse had blown. it was the under hood 10 amp. ign. fuse. and another asked what the primary...
1994 Buick Roadmaster 5.7L Cooling Systems VIN: 1G4BR82P0R
Thanks to all who replied. My apologies for not writing back sooner but we wanted to make sure car was fixed. Keith from Montana & Tim from Michigan seemed to hit it with this one. After talking to my radiator guy, he said he really couldn't test radiators or ...
1991 Chevrolet G30 Beauville 5.7L Unknown VIN: 2GAGG39K1M
Well- - - Not really a fix but here are the results. New brake shoes and hardware (springs etc.), flush out the brake fluid and bleed per book procedure. Replaced all brake hoses and machined drums (still within spec and within .010 of each other). New wheel c...
1995 Chevrolet Astro CL 4.3L heater control valve VIN: 1GNEL19W6S
Haven't fixed it yet because the customer still hasn't brought it back. With cold weather coming I'm hoping they will bring it back and then I will be able to update this post. Only had one reply that might be of help. He stated that there is a solenoid that c...
1996 Chevrolet Lumina LS 3.1L Poor Idle Quality, Surge, Stall VIN: 2G1WN52M6T
thanks for all the fast replys!! the help was appreciated. some of you suggested I check the fuel press. regulator. I had done this but not when it was hot only on start up. so I started car and while warming up I unplugged regulator and let the car warm up . ...
1997 Chevrolet K1500 5.7L engine VIN: 2GTEK196V1
There was a leak in he intake manifold between 3 and 5 . it only showed itself under extreme load it was causing the detonation and the oil consumption ... thank you for your help
1992 Oldsmobile Toronado 3.8L Dash waring display , The A/C ,heater display VIN: 1G3EZ13L9N
It took three weeks to get the dash fix through my GM dealer.I installed it and tested it and every thing works. thanks again for all the help. Warren
1992 Pontiac Sunbird SE 3.1L Excessive Emissions, Poor Idle Quality, Surge, Cuts out, Stall, Misfire, Poor Fuel Economy
Thanks for all the help. I started over on the car my self instead of going off what the other tech. in the shop said and also used a iac noid light I just got from mac tools and found that 1 of the 4 wires that go to the iac motor had a brake in it the tester... Trouble codes: 35 (unable to control idle), 44 (lean exhaust).
1993 Pontiac Bonneville SE 3.8L abs light on VIN: 1G2HX53L7P
i replace ebcm and this took care of the problem along with abs/trac control switch in console.
1998 Pontiac Grand Am SE 2.4L No Start VIN: 1G2NE52T8W
Sorry for closing so late. We had the ip reflashed & replace ignition switch. Have not heard anything from customer so I assume car fixed. Trouble codes: P1629 (Theft crank signal malfunction).
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