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Prev Professional Automotive Repair Technical Discussions for June 23, 2004
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Open Help Requests for GM
Help Request Answers
1995 Buick LeSabre Limited 3.8L Temperature Blend Doors VIN: 1G4HR52L5S
This is a high mileage car but is in very good overall condition. The customer says the A/C works fine until he shuts the car off. Upon the restart, the duct air gets hot then after a few moments gets cool again. (NOTE, the air is always discharged at the corr...
1997 Buick LeSabre Custom 3.8L Misfire VIN: 1G4HP52K2V
This car will exhibit a slight missfire under load for 2 - 3 seconds, the missfire counters will read 2 - 4 missfires on random cylinders, it may show 2,3 on one roadtest then 1,5 on another there is no consistancy, there are no missfire codes or history missf...
1991 Chevrolet Lumina 3.1L No Start VIN: 2G1W154T9M
This one is baffling us. Starts and runs fine. Will not stall. If you let it sit for 45 min to an hour it will not restart. Does not have spark or injector pulse. Has fuel and fuel pressure. Scanned with snap on 2500 found no codes or faults. Followed troubles...
1991 Chevrolet Astro CL 4.3L long crank VIN: 1GNDM19Z3M
the ecm is slow to energize the fuel pump relay at times. checked powers and grounds and inputs from the ignition switch. sometimes it takes over five seconds of cranking before the fuel pump relay is energized. i watched the input on a graphing meter and as s...
1994 Chevrolet C1500 Suburban 5.7L Heater Core VIN: 1GDEC16K3R
I Checked On Alldata For A TSB Regarding Repeated Heater Core & Or Radiator Failures. It Did Have One Which Related To Stray Electrical Current In The Cooling System. There Was Also Mention Of This Being Caused By Electrical Devices That Are Mounted On The Rad...
1997 Chevrolet C1500 5.7L Surge, Misfire VIN: 2GTEC19RXV
I have previous worked on this vehicle. Originaly came in for a stall. Ended up replacing fuel pump because of the conector inside the tank had shorted out. About three weeks later, truck came back with a miss or surge at cruise . No codes were found. Went for...
1997 Chevrolet Camaro Z28 5.7L water pump drive VIN: 2G1FP22P6V
Hello all, Have this camaro that came in for water pump not circulating enough coolant. Changed the pump and now the drive is leaking oil. The bearing was bad in the back of the original. Tore it back down and replaced the drive seal with same results it is ...
1998 Chevrolet S10 LS 2.2L Hesitation, Cuts out, Stall, MIL Lamp on VIN: 1GCCS1948W
Can anyone help?This truck was brought to us today and customer said it suddenly startde runing very bad.She left the vehicle behind our shop at a gas station.I went and drove it back and it runs great.MIL on code po122 tps.Freeze frame shows no tps reading bu...
1998 Chevrolet Cavalier Z24 2.4L timing chain VIN: 1G1JF12T6W
The car came in for an antifreeze leak and a steering groan.The steering groan was low fluid-no leaks found.The antifreeze leak was the water pump dripping with out any pressure on it.We replaced the water pump with a new AIRTEX pump.When the timing cover was ...
2000 Chevrolet Blazer LS 4.3L differential VIN: 1GNDT13W2Y
thanks for your help in advance this truck came in going into 4wd low intermidently we replaced the switch because testing it showed incorrect voltages from switch(we called a tech line to figure this out) we now have reference voltage in and out and no change...
1995 GMC Jimmy SL 4.3L 1-2 shift VIN: 1GKDT13W4S
Trans will not upshift when cold for about 1/4 mile. Once it does it's okay for the rest of the day. No codes present. Using Snap On MT2500, under trans data, TPS out of range parameter reads yes. TP delta reads no. Under engine data TPS out of range reads no....
1996 GMC Jimmy 4.3L No Start VIN: 1GKDT13W6T
This Jimmy came in on the hook for a no start. Customer reported it had run poorly the previous day, and thought it was poor fuel. Fuel filter was changed , but didn't help. I confirmed the no start, pushed it inthe shop, turned the key and it fired up. road t...
1998 GMC K3500 Sierra SL 6.5L Stall VIN: 1GDJK34F6W
Hi folks,have a 98 GMC diesel here that runs for a few minutes then dies.I replaced the fuel filter thinking maybe it was plugged,then had a heck of a time to purge the air out of the system.Turned out it was pumping mostly air,just as if it were out of fuel (...
2000 GMC C2500 Sierra SL 5.7L No Start VIN: 1GDGC24R0Y
It turns over OK, but truck does not start. It has 49.5 fuel pressure. I don't see any problem with the spark, checked it on the scope. I checked the pulse at the injectors; didn't see any problem. To start the truck, you have to put the battery on a charger (...
1995 Oldsmobile 88 Royale 3.8L blower and compressor operation VIN: 1G3HN52KXS
Hi this one is getting me.blower will not operate ac compressor will not energize there is no power to ac switch on the brown wire and no power to compressor relay on pink wire is there a conector some where from fuse panel on left side under dash to switch th...
2000 Pontiac Grand Prix GTP 3.8L abs/traction control VIN: 1G2WR1213Y
Hi Guys, Got this headache in with the abs and trac control lamps on Ran flow charts to part that says install brakeout box. The first 3 codes listed were in history and only the co244 came back at first. After a run cycle we got the p1571c. This problem seems...

Fixes & Summaries for GM
Fix/Summary Answers
1990 Buick Century Custom 3.3L No Start, Hesitation, Stall VIN: 1G4AH54N4L
Had to wait for customer to come up with money to fix vehicle. Well I got some replies on the vehicle going into clear flood mode which it wasnt, and also on the maf sensor. What I could not understand was that I didnt have an injector pulse at all, so I was l...
1995 Buick Riviera 3.8L blower VIN: 1G4GD221XS
hello everyone thanks for all your help it turn out to be a bad blower control module
1994 Cadillac DeVille 4.9L Cuts out, MIL Lamp on VIN: 1G6KD52B8R
After two cam sensors we resolved the problem. It was the cam sensor. Not a short as the tree stated. Thanks for the replies. Almost all said the cam sensor. Trouble codes: P0041.
1999 Chevrolet Venture 3.4L oil filter gasket blown off from oil pressure VIN: 1GNDX03E9X
I would first like to thank everyone who replied to my help request. I was already in the process of removing the oil pan before I started my help request. After reading the replies I received, 12 out of 14 hit the nail on the head mentioning oil pressure reli...
1995 GMC C3500 Sierra SL 6.5L Excessive Emissions, Poor Idle Quality, Misfire VIN: 1GTHC39F6S
I must say I am sorry for not replying sooner. I had reset how my mail was being shown and did not see the replies. I called the customer today and he said the truck has been running great. For Steve and Paul from Ontario, Patrick from B.C. and Mark from Newfo... Trouble codes: 18 (camshaft reference pulse), 35 (injector pulsewidth-short).
1996 GMC K1500 Sierra SL 5.7L MIL Lamp on, Code P0430 VIN: 2GTEK19ROT
Client was given the choice to flush fuel injection system and clean the intake and was forwarned that it was just a temporary fix or replace the y pipe. client elected the flush, checked with them this week and check engine light is still out. will keep check... Trouble codes: P0430 (converter efficiency bank 2).
2001 GMC Yukon Denali 6.0L side mirror VIN: 1GKEK63UX1
Joe From New Jersey said Jeeps do the same thing. Replace the mirror insert. The customer said Whoa! When inform of the price. Will consider and get back to us at a later date. Thanks Joe and Iatn. P.S. The mirror has a defrost mode built in to it and becomes ...
2000 Pontiac Grand Am SE 3.4L steering
Replies included bad hubs and steering shafts. Customer has not yet returned with vehicle for repairs. I believe the problem could be in rack but not too sure. Thanks for everyones time
1993 Saturn SW2 1.9L Excessive Emissions VIN: 1G8ZJ8573P
Thanks for all the great replies and they were very helpful. One talked about EGR staying on to long, one about leaking injectors, and among other info a prom update. The final fix was a broken vac line between the vapor canister and the purge valve. The valve...
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