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Prev Professional Automotive Repair Technical Discussions for October 27, 2006
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Open Help Requests for GM
Help Request Answers
1998 Buick Park Avenue 3.8L abs indicator light VIN: 1G4CW52KXW
hello guys. this one has me stumped. this vehicle came in the shop today for abs diag. i scanned the codes and there are none. i cleared the codes and the light comes right back on.i did a good visual on the vehicle and found the sensor at the master cylinder ...
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1991 Cadillac DeVille 4.9L engine VIN: 1G6CD53B7M
After reaasembly and vehicle started all ok until it runs for a short while. Then we lose compression on #6 cylinder. We found valves staying open. Machine shop sent new lifters and valves closed again and had compression. Started engine and after running a fe...
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2001 Cadillac DeVille 4.6L Excessive Emissions, Poor Fuel Economy, MIL Lamp on VIN: 1G6KD54Y41
Hi All My first help request. I do check the knowlege base all the time and it is a big help, as I am on my own now. Just bought this shop in the spring. I have an 01 Cadilac Deville in here that is just pooring the fuel through it. Has codes P0171 and P0174.... Trouble codes: P0171 (Lean bank one), P0174 (Lean bank two)
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1991 Chevrolet Cavalier RS 2.2L MIL Lamp on VIN: 1G1JC14GXM
Came in for the code 23 MAT too low and we installed a new sensor and later a computer when we found the sensor did not fix it. Since then we have run new wires from the sensor to the ECM and done some voltage drop testing at the ECM. There is .01 volts drop b... Trouble codes: 23 (Manifold Air Temperature low)
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1992 Chevrolet Lumina 2.5L Charge Light On VIN: 2G1WL54R4N
Hi fellow techs we are stumped. We have a charge light on in dash and when testing the alternator it shows to be overcharging. Also the transmission shifts by governor when light is on. We did the tests listed. Any help would be much apprieciated.
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1994 Chevrolet C60 Kodiak C6H042 6.6L cooling system VIN: 1GBJ6HIJ6R
This is our tow truck, it is 12 yrs old but it has low miles and has not been run hard, it does not seem to be loosing any coolant. This overheating condition has gradually gotten worse and we have tried everything with no change,so we feel we are miss...
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1994 Chevrolet Cavalier RS 2.2L brake pedal VIN: 3G1JC115RS
hello,he customers complaint was the brake pedal goes to the floor.i inspected the brake system found no brake fluid leaks and the linings are all in good condtion.no codes were found at all.i then road tested the vehical with no condition present,the pedal fe...
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1997 Chevrolet K1500 Cheyenne 5.7L abs VIN: 2GCEK19R0V
good morning techeys i have the common abs false activation on this truck. read lots of info about wheel speed sensor rust problems. what i'm questioning is that it appears that the problem is with the sensors that are "not" getting thier signal from an inter...
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1999 Chevrolet Corvette 5.7L instrument cluster VIN: 1G1YY12G1X
while riding the instrument cluster will illuminate the security light,traction control, abs, & srs. instrument cluster info. center says service engine soon, decressed engine performance, service tracion control, service tire monitor & radio loses power , chi...
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2002 Chevrolet Silverado 2500 HD 8.1L belt noise VIN: 1GCHK29G22
Cleaned all pulleys & installed correct belt, his belt was too long. Noise was gone for 3 days. Came back & insalled new tensioner & idler pulleys. cleaned surfaces again & noise is gone. Customer called back this morning, making same belt squeal noise. We tri...
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2003 Chevrolet Silverado 2500 6.0L Misfire, MIL Lamp on VIN: 1GCGC24U13
This thing is cursed. Its got a completely random misfire. sometimes there's none at all then the next start it will miss like crazy on any random cylinders. the computer seems to respond different everytime i perform a ckp variation relearn. it will barely ru... Trouble codes: P0300
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1995 GMC Jimmy SL 4.3L no start VIN: 1GKDT13W8S
This vehicle stopped running in my lot. Customer came with it stating it stopped running when his son was driving, he got it started and came by. It was missing and running terrible and then stopped. I have checked the crank sensor, distributor cap adn rotor. ...
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2004 GMC Yukon XL 1500 SLE 5.3L Hesitation VIN: 1GKFK16ZX4
Hi guys I have the bosses truck. His complaint is intermittatly when he goes to accel. it has a bad hesitation. the truck has fly by wire throttle. There is no trouble codes in any of the modules with a tech 2 hooked up. the maf has been clean and i have pulle...
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1993 Oldsmobile Achieva S 3.3L No Start VIN: 1G3NL14AXP
hello everybody i have a customer who tried to install a engine in this achieva after he installed the motor it wouldnt start so he brought it to me after checking crank sensor computer and module i realized that the motor he installed was out of a 92 and the ...
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1996 Oldsmobile Cutlass Ciera 3.1L tcc VIN: 1G3AJ55M6T
Customer has brought this vehicle in compl. of poor run at cruise, we took the car for a test drive, and found the Torq. converter is locking and unlocking at about 40-50 mph. The ECU is commanding the T/C to engage and disengage. we scope checked the TPS, the...
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1989 Pontiac Grand Prix SE 2.8L Excessive Emissions, Poor Idle Quality, MIL Lamp on VIN: 1G2WP14W1K
The car was brought to us with a new IAC installed and running poorly and stalling. Had 3 codes 33 44 and 35. 33 is high map voltage 44 is lean condition. and 35 is Iac problem. Found o2 sensor broken installed new o2 sensor and new spark plugs. Cleared codes ... Trouble codes: 33 (MAP voltage is high)
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1994 Pontiac Bonneville SE 3.8L abs/trac off light on VIN: 1G2HX52L8R
hello. car came in with abs light and trac off light on. checked for codes in all systems none found. tested main relay for abs and replaced it, also replace abs pump relay. tested system per alldata and came up with pin 1 and 19 (grounds) having 4 ohms instea...
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1996 Pontiac Trans Sport 3.4L volt gauge VIN: 1GMDU06EXT
hi ive got a 96 trans sport , heres the problem , i get in the car start it fine its running ,but i notice that the volt meter gauge is not reading above 14 volts its not even moving like it uasully is ,then i go ahead and put it in drive and then stalls right...
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2004 Pontiac Grand Prix GT1 3.8L security system light
This vehicle came into me with a code p0403 Exhaust gas recirc circuit malfunction. Replaced egr and solved problem. Came back a week later and the light was on againcode p0446 evap. emissions vent malfunction, Removed can and cleaned vent, solanoid and lines,...
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2003 Saturn L300 3.0L BCM 2 fuse VIN: 1G85JW54R7
This car came in with two problems. First, the cooling fan would stay on with the car off. I replaced cooling fan control module and it was ok. Second, the A/C heater controls on the dash don't work. there is no HVAC function at all. Found 10 Amp BCM2 fuse in ...
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Fixes & Summaries for GM
Fix/Summary Answers
1997 Cadillac DeVille 4.6L dies at times VIN: 1G6KD54Y3V
after replace crank sensor i drove the car 50 miles and it died again. i hooked up a fuel gauge since we replaced the fuel pump. then i drove the car 175 miles and has not died. we think it is heat related because when it was happing it was like high 80's and ... Trouble codes: P0603 (pcm keep alive memory), P0741 (tcc perf or stuck off), P1599 (cc power mgmt mode or engine stall), P1630 (theft learn mode or system volt error), U1016 (loss of pcm communication), U1040 (loss of ebcm/ebtcm comm).
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1992 Chevrolet Lumina Euro 3.1L axleshaft? VIN: 2G1WN54TXN
well guys i still am amazed at the amount of help you guys gave a tech you have never met,thank you very much.it seems that you are better then any info system out there!i had a lot of replies that it was bearings,i had replaced the bearings and cv shaft with ...
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1995 Chevrolet Caprice Classic 5.7L No Start, Hesitation, Stall VIN: 1G1BL52P7S
Well I would like to thank everyone who replied to my request. Many good thoughts and alot of input.We checked just about everything that all sugested.Wiring harness were checked no bare spots or rub marks all the way down to the distributor. Checked the fuse ...
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2002 GMC Envoy SLE 4.2L No Start, electrical VIN: 1GKDT13S32
FIXED.. I believe I had several problems. First passenger side temp was the temp control motor located behind glove box. The door module ( door lock switch) was not working for locks, replaced door module & bcm ,programed them & all works well now.I think when...
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1996 Hummer H1 6.5L Speedometer VIN: 137ZA8336T
We finally pulled the speedo head and sent it for repair. It was bad and pulling the DRAC buffer signal to ground. One response said the DRAC pulled voltge to ground but after going through this with the speedo shop I found the DRAC sends the square wave to th...
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2000 Oldsmobile Intrigue GLS 3.5L Starter VIN: 1G3WX52H6Y
hey thanks evryone who offered help on this one. What i ended up doing was runnning a direct power wire to the starter solenoid. i then test drove the vehicle for a week. Finally the boss man had the car for the weekend when it no started on him. he hit the po...
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