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Prev Professional Automotive Repair Technical Discussions for August 27, 2008
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Open Help Requests for GM
Help Request Answers
1995 Buick Riviera 3.8L Hesitation, Stall, MIL Lamp on VIN: 1G4GD22K5S
This car is new to my shop. The only history I have is as stated (transmission work and water pump recent). Car was dropped off after hours, with complaint of intermittent stumble/stall and mil coming on.Scan tool had P0341 and P0342 in history, none current. ... Trouble codes: P0342 (cmp signal circuit), P0341 (cam crank sync error)
1997 Buick Skylark Limited 2.4L low/no braking force to front VIN: 1G4NJ52TXV
we have no or low braking force to front wheels. rear brakes work good and the car will 'sit' in the rear while braking normally. no abs codes were found. driving the car with abs system disconnected does not change anything. we are investigating brake master ...
2008 Buick Lucerne CXL 3.8L ride comfort VIN: 1G4HD57268
Customer is complaining in a difference in the ride quality between their two, 2008 Lucernes. I have only driven the one with the "rough" ride, which, in my opinion, feels pretty good. multiple drivers of these vehicles have all commented on the difference. I ...
1999 Cadillac DeVille d'Elegance 4.6L No Start VIN: 1G6KE54Y5X
Vehicle came in for crank, no start. Please read entire entry, as i have performed many tests. B2750 and U1255 are hard codes in the IPC and U1255 in the SIR. I have good key with correct code. I have good resistance from pellet at ipc terminals and during cra... Trouble codes: B2750, U1255, P1631
1986 Chevrolet Corvette 5.7L No crank VIN: 1G1YY6782G
Cust has intermittent no crank/no start. No codes, when this condition happens battery voltage goes below 10volts according to dash/digital voltage gauge, I jump starter enable relay car will crank and start runn rough, sometimes will just crank w/no start, so...
1986 Chevrolet S10 2.8L fuel gauge VIN: 1GCBS14RXG
we could use your help. we replaced electric fuel pump on a 1986 chev.s10 truck.after the repair was made the gas gauge became erratic when brakes are applied.we dropped the tank again,& replaced fuel tank sending unit (same results) we checked grounds @ tank...
1989 Chevrolet P20 Step-Van 5.7L Poor Idle Quality, Hesitation, Surge, Stall VIN: 1GBKP32K7K
Customer brought this to me on the hook after he worked on it himself (yeah !!!). It came in crank no start. after we repaired the wiring to the control module it will run poorly and idle will surge like there is a vacuum leak. there are only 4 vacuum ports on...
1990 Chevrolet Lumina 3.1L No Start, Poor Idle Quality, Stall
I got a real head scatcher here...this car came in for a very hard start condition and would die when step on gas pedal...when I finally got the car started to drive into shop noticed A/C compressor run all the time , wont shut off...This car is very hard to s...
1994 Chevrolet C1500 Cheyenne 5.7L cruise control VIN: 1GCEC19K9R
I cant get my si program to work and this truck , needs repair on cruse control , will any one help with the diagnostic procedure , does nothing checked fuse and found plug under dash , how do i ohm it out angelo
1997 GMC K1500 Suburban SLT 5.7L brake pedal VIN: 1GKFK16R3V
We do not know where to go next. Why would the brake pedal slowly go to the floor when you are pushing the brake pedal.The only thing we have not changed are the rear wheel cyliners and the front calipers. Any ideas and or help would be appericated.
2002 GMC Envoy SLE 4.2L MIL Lamp on VIN: 1GKDT13S82
Hey Guys, This vehicle came in about a month ago with this code,cleared out code, and a couple weeks later code back again. It passes the diagnosic check test every time I road test, so its very intermitant. Well its back again with same code. Conditions for s... Trouble codes: P0495 (Cooling Fan Speed High)
1999 Oldsmobile Intrigue GLS 3.5L Electronic VIN: 1G3WX52H7X
customer came in with a/c not cooling at all. charged a/c, added dye, now the right side blows cold, left (driver) blows lukewarm. we replaced the blend door actuator, no help. same with the control head. when we turn the key on, the actuator goes through the ...
1999 Pontiac Bonneville SSE 3.8L Interior lights VIN: 1G2HZ52K4X
This is a weird one. Have been to Mitchell Manual and GM service information site. GM site had at least a test for several types of problems with BCM lights. This one, interior lights stay on after door is shut. They dont dim out either when driven. Lights sta...
2000 Pontiac Montana 3.4L ABS Module VIN: 1GMDX03E2Y
Customer opted to take car home and bring back after the holiday weekend, said that he felt comfortable driving it in town without ABS. He drove it about 2 miles to his office and when he pulled onto the lot the brake pedal dropped to the floor. He brought it ...
1993 Saturn SL2 1.9L fuel gauge VIN: 1G8ZK557XP
I am hving problems with this saturn its a 93 SL2 twin cam, the fuel gauge stays in the middle & does not move. I have already replaced the sending unit inside the fuel tank but made no difference. When you rock the car back & fourth the gauge move a little, l...

Fixes & Summaries for GM
Fix/Summary Answers
1993 Buick Park Avenue 3.8L ride height VIN: 1G4CW53L7P
We got the vehicle back and put in the cheaper shocks as suggested in one of the replies. We had the same results, a very stiff ride. We then disconnected the air shocks and extended the shock 10 times with an air nozzle and then collapsed the shock totally,...
1988 Chevrolet Spectrum 1.5L Stall VIN: J81RG5178J
Well, I'm going to call this one fixed although we're still waiting for our customer to bring us another carb that he has from an identical car. Took the top of the carb off and found contamination and corrosion throughout and enough related crud to choke a ho...
1996 Chevrolet Cavalier 2.2L starter VIN: 3GJC242TS8
thanks to all who answered. i replaced starter . i guess it was shorted
2002 Chevrolet Tahoe LS 5.3L No Start, Hesitation, Stall, eratic gauges VIN: 1GNEC13Z52
I would like to say thank you to all the replies I had on my wife's Tahoe. I know time is hard to come by to deal with other peoples problems. The way I type it could be days. I did not say that the ignition switch was my first thought on this issue. I guess I... Trouble codes: B2647, U1064, U1096.
2003 Chevrolet Trailblazer North Face 4.2L a/c system VIN: 1GNDT13S33
mode acuator was stuck closed I opened it up and now it works.
2005 Chevrolet Express 3500 6.0L cluch command
Did'nt have very good diagraum from alldata since my printer is onop. could figure since Steve helped that command from pcm was not ther, but intermitant. replaced both Hp & Lp swithes/sensors as alldata calls e'm that got wierd, no cammand fron master, gyna...
2005 Chevrolet Silverado 2500 HD 6.6L Unknown VIN: 1GCHK23285
The truck is finally fixed. After talking myself into removing the valve body, which was very easy by the way, I located the E shift valve which was stuck in a mid position. I removed the valve deburred it with 2000 grit paper cleaned it reassembled and sure e...
1995 GMC K3500 Sierra SL 6.5L Reservoir VIN: 1GDHK33F5S
I would like to thank all of you who took the time to answer my call for help. We removed the T-stat and belt from the water pump then started the engine. Right away we observed bubbles coming from the left side of the runner. Removed heads and found the left ...
2002 GMC Yukon Denali XL 6.0L abs VIN: 1GKFK66U12
Well, oh well, oh well. It doesn't surprise me why not many replied. I had literally did just about everything one could do. I walked away from the truck about 10 am this morning and did some other things. After lunch I decided to go back to it. The first thin...
2004 GMC Canyon SLE 3.5L 2-3up shift VIN: 1GTDT13614
special thanks to the 4 replies. between extended warranty and customer who would not pay for trans disassy. i told customer to go to dealer. i don't need another headache.
2001 Oldsmobile Aurora 4.0L Cuts out VIN: 1G3GS64C41
Thanks to Jack, David and Laneard this one is fixed. I replaced both sensors. The new sensors were a different pt number and the dealer said this is the only number they can get for them now, and of coarse they haven't seen "any" failures of this sensor. I w... Trouble codes: P0386, B (Crankshaft Position Sensor B performance).
2000 Pontiac Grand Prix GTP 3.8L Hesitation, Cuts out, Stall VIN: 1G2WR521XY
2000 Pontiac Sunfire GT 2.4L High idle VIN: 1G2JD12T3Y
Hey, Got this thing figured out. Last night before anyone replied we pulled the intake and found the gasket leaking a little bit. So we replaced that. It brought the idle down a bit, but still not within spec. So this moring we following Gerry's (from michi...
2002 Saturn L200 2.2L Poor Fuel Economy VIN: 1G8JU54F52
Customer took car to dealer. I think a new sender and new line would have fixed. Too bad I can't gamble with the customer's money to see which would have fixed it. LOL Thanks for all your help.
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