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Prev Professional Automotive Repair Technical Discussions for August 21, 2008
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Open Help Requests for GM
Help Request Answers
1999 Cadillac Seville STS 4.6L security VIN: 1G6KY549XX
Good morning techs. I have captured a 1999 seville. The cust states the alt was overcharging and boiled over three batteries. The cust put three new alts and batts on. The car came in with an overcharging issue. I checked it out and found the car was not charg...
1989 Chevrolet Corvette 5.7L cooent level sensor VIN: 1G1YY2181K
This corvette has a low coolant light on & off when you drive. We replaced the sensor in the rad. Check the wiring and what we have found is the coolant level( when you accelerate) drops down pretty far. We tried filling it when its low, we also tried bleeding...
1995 Chevrolet Camaro Z28 5.7L Hesitation, Misfire VIN: 2G1FP22P2S
This vehicle came into our shop last week for missing under light acceleration and when accelerating under heavy throttle from 50 to 70 mph. I have replaced the optispark distributor and the EGR valve. The car still has some hesitation and bucking. The plugs a...
1996 Chevrolet K2500 Cheyenne 7.4L rear axle VIN: 1GCGK29J3T
This is what nightmares are made of...3 years of I can not get it to stop leaking out of the rear axle seals.This is a full floating axle, 8 stud ,3/4 ton ,4x4.For the last 3 years the axle seals let reason..the max time I get before they let go is abo...
1998 Chevrolet K1500 Cheyenne 5.7L Poor Idle Quality, Misfire VIN: 2GCEK19R3W
Please help!!! This truck came in with the complaint of an intermittent misfire under heavey load. Problem showed up after the intake gaskets were replaced at another shop. Truck had code for random misfire (history misfires for #3 & #6) we were unable to dupl... Trouble codes: P0300
2000 Chevrolet Corvette 5.7L Right front wheel VIN: 1G1YY32G7Y
ohm test wiring to EBCM is good.I,m thinking EBCM
2001 Chevrolet Impala 3.4L No Start VIN: 2G1WF55E01
This ones a little wierd so I decided to bounce it off some other guys. 2001 chevy Impala was towed in when you turn the key on only the check engine light comes on . had 2 engine codes one was a security code 1626 and a cooling fan #1 error code . I checked t...
2004 Chevrolet Express 1500 4.3L no injector pulse VIN: 1GCFG15X44
Vehicle came in with a crank no start issue. When vehicle arrived it started normally, but when repeatedly starting would occasionally start and immediatly stall. Vehicle has no codes in any module, current or stored. Graphed the injector pulse width and found...
1991 Oldsmobile Cutlass Calais S 2.3L Cuts out VIN: 1G3NF14A5M
While driving the vehicle it will cut out like the ingnition system was shut down completely, just for a little bit. I have the best luck with the engine about 2200 rpms to get it to do it. I had an esc module code in there, I did a secondary scope while it w... Trouble codes: 43 (esc module or circuit failure)

Fixes & Summaries for GM
Fix/Summary Answers
1999 Buick Century Limited 3.1L Misfire VIN: 2G4WY52M2X
Hi everyone thanks for all your help. Jake [...]. hit it dead on the problem was in the fuel rail. When I changed the injector I looked for debris on the inlet screen, But the problem was in the fuel rail. Thanks for all the help!! Trouble codes: P0300.
1990 Chevrolet Corvette 5.7L Surge VIN: 1G1YY2385L
I want to thank everyone that replied i had 32 replies.WE replaced all injectors and it runs great now.Thanks to Christopher and the rest we found some good deals on injectors.I wish i could thank everyone by name but with 32 replies its kinda hard , so thanks...
1995 Chevrolet C1500 Cheyenne 5.7L flaps VIN: 2GCEC19K3S
after speaking to customer about repairs, he has decided to wait until he can remove truck from service and leave for repairs. With all the "stuff" he has laying on dash, there may be something in the ducts. I can hear the flaps trying to move but until he bri...
1996 Chevrolet Lumina 3.1L Hesitation, Misfire VIN: 2G1WL52M9T
Thank you to everyone who replied to my help request. As I said in the update, it just came out of it while I was rechecking things one night. I kept it and drove it around for a few days, and the customer has had it back for about a week. At this point, I ...
2000 Chevrolet Astro 4.3L No Start, Stall VIN: 1GNEL19W6Y
Since it has not acted up, I have decided to change the VCM. According to Alldata, the U1016 code indicates that the last three numbers of the DTC is the ID module number that is failing. The number is 016. This number is the VCM. Vehicle has left our shop as ... Trouble codes: U1255 (Genetic/class 2 Communication).
2002 Chevrolet Cavalier 2.2L controls VIN: 1G1JC12412
I want to personally thank Steven from Missouri! If you're every near the twin cities on MN, the steak is on me! I also want thank all the replies because any and all comments helped relieve the lonely feeling of frustration. It was the wire right by the p...
1999 GMC K1500 Suburban SLE 5.7L Door Lock Actuator VIN: 1GKFK16R3X
Thanks to all that answered our request. Most all of you hit the nail on the head. We had 4 orignally bad door lock actuators,we replaced all 4 with after market actuators 3 of which would only work a time or two out of the vehicle. We finally replaced the 3 b...
2003 GMC Yukon Denali XL 6.0L Stall VIN: 1GKFK66U83
Several replies were dead on. It appears it is in the transmission, this truck just had a transmission overhaul a couple a weeks ago. It was done at a transmission shop we recommend, so we called 'em up and they sent a wrecker for it. I talked to the installer...
1993 Oldsmobile Cutlass Ciera 3.3L Excessive Emissions, Poor Idle Quality VIN: 1G3AG54N3P
i have it fixed!thanks for all the help responses. i rechecked cat several times,no problem found. last night i drove it home what the gynesis in movie mode. the maf was glitching out from 12 mph to 28 mph,creating a lean condition-replaced with new as i have ...
1989 Pontiac Firebird Trans Am 5.0L vats VIN: 1G2FW21F0K
Thanks for all the input. The VATS system can operate the starter without firing the injectors. There is a flow box that indicates that situation, but it didn't fit this situation. I went to look at the car. I went from B+ to the purple and [...] wire at th...
1996 Pontiac Grand Prix SE 3.1L lifter VIN: 1G2WJ52M2T
well thanks to all who reply took it back apart and pulled all the lifters out also removed the oil pump drive so could turn oil pump with a socket oil was getting into lifter galley with no problem at that point took apart the lifters and all were full of slu...
2005 Pontiac Vibe 1.8L recirculation door VIN: 5Y2SL63815
The fix was the actuator. I've seen cars in the past that had positions sensors on the actuator but that was not the case here. This actuator had only two wires. Thanks.
2004 Saturn Vue Red Line 2.2L Shifter VIN: 5GZCZ23D54
Thanks to all for the excellent replies. Tom from Alberta was right on about the 'graphite' at the ends of the cables, they were the reason for the failure. Scottie from North Carolina was correct about getting the whole shifter assembly, as the parts man said...
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