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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for August 23, 2004
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Open Help Requests for GM
Help Request Answers
1992 Buick Regal Gran Sport 3.8L Misfire VIN: 2G4WF14L8N
Complaint is that on hard acceleration the car misfires right before it shifts, after duplicateing the complaint it appears that the vehicle is limiting RPM to approx.3500- 4000rpm. The one thing that is unusual is that the pcm thinks the car is in neutral or ... Trouble codes: 34 (Mass air flow)
1995 Buick Regal Custom 3.1L Poor Idle Quality VIN: 2G4WB52M5S
came in with intermitant high idle problem which seems to be gone at this time but other intermitant problems persist, at times cruise is inop. except in gearshift 3 position, door locks lock at times when the drivers door is closed, prior to moving the gear s... Trouble codes: 28 (transmission range selection sensor error.)
1997 Buick Park Avenue 3.8L starter VIN: 1G4CW52K6V
we have a 1997 parkave in the shop which on occasion has a no crank condition.battery and alternator test good.cables and grounds secure and free of corrosion.we did replace the starter due to a horrific intermittent grind.fly wheel teeth are good.problem we h...
2002 Buick Rendezvous CX 3.4L idle high VIN: 3G5DA03E52
Customer complaint of 3 problems occuring at same time: 1. idle high up to 2500 rpm and holding steady at times 2. AC not cold but will blow 3. Tape player radio has to be turned on and off before it will work (may not be related) Vehicle has no vaccume leaks ...
1965 Chevrolet el camino 327CID intake backfire VIN: 135805K169
customer has had a backfire in engine on #3 (found by disconnecting #3 wire and having intake popping stop) when cold (does not occur when fully warmed-up) on accel since purchasing vehicle, a: 1965 elcamino 327-4v 250 hp, a/t, msd elect dist w/remote coil. af...
1987 Chevrolet S10 2.8L brakes VIN: 1GCDT14R7H
Truck came in with a hard pedal and no power assist. running rough at idle. Checked booster and had vac leak at the booster. Replaced booster and then went to service rear differental and rusted brake line started leaking at diff housing. Replaced line and ble...
1993 Chevrolet K1500 Cheyenne 5.7L 3-4 clutches repeat burned VIN: 2GCEK19K6P
previously o.h. , removed spring packs in 3-4 clutch housing per bulletin, tested solenoids all good,
1995 Chevrolet Lumina LS 3.4L Surge VIN: 2G1WN52X7S
This vehicle when started will go to 4000 rpm and then slowly die down to 1000. Then the idle will surge from 950 to 1000 until warmed up. Replaced iac. Checked for vacum leaks, none apparent. Wondering if anyone else has run into this. I suspect leaking intak...
1997 Chevrolet Cavalier 2.2L drl VIN: 1G1JC1245W
Car had trans OH at another shop, was returned because the DRL indicator light on the IPC was flashing on & off. The DRL lights do not come on either. I did some tests, found that the DRL Relay control from the IPC (Ground) is not adequate to activate the rela...
2000 Chevrolet Monte Carlo LS 3.4L Steering Wheel VIN: 2G1WW12E3Y
Hi group, looking for help in regards to a clunk felt in the steering wheel when turning, braking or accelerating. You have to be really looking for it to feel it, but when you felt it once it's there all the time. It feels like there is a loose part between t...
2001 Chevrolet Tahoe 5.3L unknown VIN: 1GNEK13T21
Hello all , This one started out at the dealer where they cut the rotors and checked out sensors.No codes, antilock lite not illuminated. I searched MOD for service bulletins regarding this and found none. The symptom is that the antilock energizes at low sp...
2003 Chevrolet Tahoe LT 5.3L fuel gauge VIN: 1GNEK13Z33
Looking for some help from you GM guys. 03 Tahoe, erratic fuel gauge. Will take the tank down to 3 gallons remaining(trip computer works fine), and analog gauge will read just below 1/2, never gets to below 1/4. Upon filling tank, will stick at 3/4, then retur...
1999 GMC Yukon SLE 5.7L engine VIN: 1GKEK13P3X
Hello all I am looking for some support on a customers vehicle. A local quick lube recently performed an oil change on the vehicle, and while doing so over filled the oil. Apparently the confused the 5.7 for a 5.3. They supposedly drained some oil out and sen...
1999 GMC K2500 Sierra SLE 7.4L MIL Lamp on VIN: 1GTGK29J5X
Hello tecks. This is my truck lucky me.Driving home the mil came on. I scaned it and found code p0175 rich bank 2. I then looked at the fuel trim and found both banks to be rich, subtracting fuel. Bank 1 at idle -7.8 bank 2 at idle -8.6. At cruse bank 1 is -12... Trouble codes: P0175
1985 Oldsmobile Delta 88 Royale Brougham 5.0L No Start, Poor Idle Quality, Stall, Misfire VIN: 1G3BY69Y2F
customer complain of vehicle running very rough in the morning and some time will not start unless you remove four wire connector. We were able to duplicate problem and could get vehicle to run smoothly by disconnecting computer and restart run good. reconnect...
1994 Oldsmobile Cutlass Ciera 3.1L MIL Lamp on VIN: 1G3AG55M3R
I have this vehicle and it has a check engine light on. I hooked up my OTDC scan-tool with the OBD I adapter to pull the codes but I cannot get the tool to communicate with the vehicle. I noticed that the 12 pin connector has only three wires. A black wire wit...
2003 Oldsmobile Bravada 4.2L tranfer motor VIN: 1GHDT13S33
dealer replaced motor twice/for burning out. another garage replaced motor/encoder on front transfer. other garage replaced also three speed sensors/ computer checked all wiring from alldata. when he drives vehicle he finds that on voltage line to transfer mot...
1994 Pontiac Bonneville SE 3.8L Poor Idle Quality VIN: 1GZHX5215R
This is my first time trying this so here goes..this car is a carlot car.It is hard to start cold.unless you go to clearflood mode then it starts..Once it runs it then runs rough..I have ramped everthing on this car..Fuel pressure is at spec waveform is great....

Fixes & Summaries for GM
Fix/Summary Answers
1986 Buick Regal 3.8L No Start
First I would like to thank all that responded especially the ones that got me to looking at fuel supply and away from ignition, I often respond to help requests and was overwhelmed, It shows how much help is there when you just ask, OK the fix, I removed the ...
2000 Buick Regal LS 3.8L ignition lock VIN: 2G4WFS51XY
Thanks for all the replies. Rodney-Thomas and leneard hit it on the spot . Problem was the shift release solenoid. Unfotunately you have to buy the whole shiter assembly. Sucks for the consumer the the part itself is not replacable. Probably would of only been...
1995 Cadillac DeVille Concours 4.6L clicks the throttle VIN: 1G6KF52Y8S
thank you to 3 replies I recieved we tested the old motor and found it bad ,I installed a new iac motor and no more clicking.
1997 Cadillac Catera 3.0L Misfire VIN: W06VR54R1V
thanks for those who took the time to reply...i checked the ign wires and # 6 was defective but miss still occurs..checked ign coil ok..injectors are buried so i can not listen to them..but i suspect headgasket problem..cheched fuel vapors in radiator resv. ... Trouble codes: P0300 (misfire detected), P0306 (cyl 6), P1113 (intake switchover ckt problem...what is this code for).
1973 Chevrolet suburban 350CID Power operated Tail gate VIN: CCY163F126
Thanks very much to Timbotech. He hit the nail right on the head with the fix. He told me that the motor was probably frozen and needed to be shocked to work. I had my wife press the dash switch to the up position while i slammed the tailgate shut. As soon as ...
1995 Chevrolet safari trek 6.5L parking brake VIN: 1GBKP37F4R
Sorry for the slow reply but we just went through hurricane charley. I did not get the chance to try the suggestions that i got for adjusting the driveshaft brake on this because the owner came and got it and stocked it up in preparation of the hurricane. The ...
1997 Chevrolet Venture 3.4L Misfire, MIL Lamp on VIN: 1GHDX06E4V
thanks everyone for your input and suggestions. Before I tore the motor down looking for gasket problem I took the fuel rail off and pressurized it on the bench and low and behold the new injector that I installed developed a leak. I eplace the #^ injector wit... Trouble codes: P0300 (Random cylinder misfire).
2002 GMC Savana 3500 5.7L Misfire, MIL Lamp on VIN: 1GDHG31RX2
Thanks to Mark, Rusty, Paul and Robert for getting me to think about this problem. We came back after the weekend and started with a clear head We had changed dist cap & rotor when we did first repair and used oem parts. Compression test showed cylinder #4 to ... Trouble codes: P0300.
1995 Pontiac Grand Prix SE 3.1L Stall, Misfire VIN: 1G2WJ52M1S
Thanks for the replies, the customer took the vehicle and traded it in on a new vehicle. Trouble codes: 13 (Historical code O2 senser open).
1996 Pontiac Bonneville SSE 3.8L blower VIN: 1G2HZ5214T
i found a vac leak at the blend door actuator. this repaired the problem thanks for all your help...
1997 Pontiac Firebird 3.8L MIL Lamp on VIN: 2G2FS22K2V
With all of the help from you people we replaced the Catalytic Converter with a factory remanufactured cat. The Cat has been on the car now for 3 weeks and no check engine light. Sorry I took so long for a fix i just wanted to besure the problem was fixed befo... Trouble codes: P0420.
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