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Prev Professional Automotive Repair Technical Discussions for August 10, 2004
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Open Help Requests for GM
Help Request Answers
1989 Cadillac DeVille 4.5L speedometor VIN: 1G6CD5153K
I've got a interesting challenging problem this vehicle exhibits a speedo fluctuation from a few miles per hour to 10-15 mph as the vehicle runs at a steady speed. This problem gets worse as the vehicle gets warmer. I've sent the cluster in for repairs only to...
1990 Cadillac Eldorado 4.5L interior instument cluster VIN: 1G6EL1337L
i have Tried everything i can tink of here but the instument cluster will not light up
1997 Cadillac Seville STS 4.6L compressor VIN: 1G6KY5299V
customer original complaint was noise under hood, found that a/c compressor was noisey and recommend replacement,customer said to fix it , so we replaced the compressor with an ac delco compressoe and receiver also a gm orfice tube which had some debris caught...
1991 Chevrolet K1500 Cheyenne 6.2L black smoke VIN: 2GTEM19C2M
cust. is complaning about black smoke out exhaust so bad you couldnt see through it, happened only once - pulling a long steep hill, with a trailer, i cant duplicate it. and can only verify some normal black smoke on heavy accel. it has no codes and runs good....
1992 Chevrolet Blazer Cheyenne 5.7L A/C pressures VIN: 1GNEK18K3N
Customer brought in his blazer stating that his A/C "blew up". This has happened a few times since the vehicle has been retrofitted. There is no evidence of dye anywhere near an A/C component. There is a sprinkle of dye on the back of the motor behind the inta...
1995 Chevrolet safari trek 6.5L parking brake VIN: 1GBKP37F4R
Good afternoon group. This is a little off subject but i have a 95 safari trek motorhome that came in for a hydraulic leak in the parking brake. We replaced the leaking switch but the auto park still doesnt hold. You can hear the hydraulics work now but the br...
1995 Chevrolet Blazer 4.3L Excessive Emissions, Poor Idle Quality, Misfire VIN: 1GNDT13W7S
Cyl's 2, 4, & 6 were not getting fuel while 1, 3, & 5 were showing rich condition. Replaced all plugs and CFI unit. All cylinders are firing now, but have a miss (PO300) and the only cylinder that will show a misfire code is #5. Cylinder #5 has 130 PSI compres... Trouble codes: P0300, P0305
1998 Chevrolet Tracker 1.6L MIL Lamp on VIN: 2CNBJ136XW
Need some help if someone has seen this before i have had this and another with the same problem .all the egr selonoid pres transducer and valve are working i can make the egr work on the lift .the map voltage changes when the egr is applied . i can apply 3 in... Trouble codes: P0400
1999 Chevrolet Tahoe 5.7L unknown VIN: 1GNZK13R5X
found evaporator plugged, replaced, as well as reciever drier. no oriface tube in system, flushed, system pressures still too high, not cooling. removed new oriface, presure dropped, no cooling. swapped cmpressor with known good unit, no change.
2001 Chevrolet Silverado 2500 HD 6.6L cab VIN: 1GCH23151F
this vehicle has a very loud vibration sound in the passenger compartment it comes in around 70 mph and gets louder the farther you drive and cycles with a/c
1999 GMC K1500 Suburban SLE 5.7L No Start VIN: 1GKFK16R4X
Hi there. I have this no start condition. It has spark fuel pressure is 38 psi and it will start with starting fluid.It just wont stay running. Check for injector pulse and can see them working but it still wont start. I have noticed that fuel preasurre bleeds... Trouble codes: P0300 (random misfire), P0304 (cyl 4 misfire)
1990 Oldsmobile Cutlass Supreme 3.1L alternator VIN: 1G3WH54T3L
Thanks in advance.This Olds has been a nightmare. Two alternators have been installed in our shop prior to my bout with it. Car arrived dead, charged battery and tested it was alright,checked for power to the alt, fusible links and the 'L' terminal. Voltage is...
1997 Pontiac Grand Prix GT 3.8L blower motor VIN: 1G2WP12K6V
This Grand Prix has a manual fan control knob with settings 1 through 5. 5 being the high speed setting.Speeds 1,2,3,4,are inop,so I replaced the fan resistor.This did not fix the problem.Also noted the small yellow a/c indicator light will not illuminate when...
2000 Pontiac Bonneville SE 3.8L No Start
Hello, I'm to my last resort, i'm working on this 2000 Pontiac Bonerville and I am unable to get it to run, no fire. Customer says she parked it for a couple days and went to start it up and just crank and crank. I have injector pulse, but no fire. I'm gettin...
1997 Saturn SW2 1.9L shift VIN: 1G8ZK8271V
Saturn Tech, This wagon belongs to a student of mine and we are having a hard time coming up with a logical repair path. We have checked the wiring going to the transmission as mentioned in a TSB. We have alot of codes as outlined above and have read many o...

Fixes & Summaries for GM
Fix/Summary Answers
1989 Chevrolet Camaro Iroc-Z 5.0L Temp gauge VIN: 1G1FP21E1K
The fix for this vehicle was to replace the temp gauge with a new one from GM. We had all the correct grounds and connections in all the correct places. Tried another used gauge and it worked fine so, we ordered and installed a new unit and all is fine. Than...
1994 Chevrolet Lumina APV 3.8L charging system VIN: 1GNDUO6L5R
George and Deke hit the nail square on the head. The red wires coming off the brown fusible link on the starter were severely corroded. Soldered in 6' of clean wire and shrink wrapped it, van is down the road and customer is happy. About half of the eleven rep...
1996 Chevrolet K1500 5.7L Unknown VIN: 1GCEK14R8T
Sent the car to the dealer. I pick it up tomorrow. The Tech told me It was the dreaded updated harness that everyone told me to check and I didn't, here is one reply: Paul, Contact your local Chevy dealer and get a copy of TSB #66-71-03A. It's an internal grou...
1997 Chevrolet Tahoe LS 5.7L Pressure control solenoid VIN: 1GNEK13R3V
Thanks to all who helped out, nearly all of you were correct. I dropped the pan and found a real mess of shavings and clutch linings. So I am in the process of installing a new transmission. and of course...Flush the cooler/lines. I did get out of the customer...
1996 GMC Sonoma SL 2.2L tensioner VIN: 1GCCS1445T
Many thanks to all that responded to my help request. This truck I was fixing for another shop. Come to find out this all started out as a generator problem. Shortly after replacing the gen. the tensioner started making the noise. They replaced the tensioner. ...
1986 Oldsmobile Cutlass Ciera Brougham 2.8L hard start. VIN: 1G3AM19W9G
hey gm guys, well i seem to have repaired this vehicle. although all your replies were good nobody hit it on the head. howerver after messing with this car i have gained a better understanding of it. the culprit causing this problem was that somewhere down the...
1993 Pontiac Grand Am SE 3.3L Poor Idle Quality, Surge VIN: 1G2NW54NOP
sorry it took me so long to reply the customer wanted to rescedule and returned 2 week's later with a diffrent car , sold old car to car lot. thank's to all who replyed i seen some great reply's. robert m [...]
2000 Pontiac Montana 3.4L MIL Lamp on, fuel gauge erradic VIN: 1GMDX03E6Y
Sorry took so long to email the fix. Van was rescheduled for today. We installed new sending unit and it took care of problem. As far as TSB, kind of sent us on a wild goose chase. Sending unit was available without buying complete module. Thanks for everyones... Trouble codes: P0463.
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