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Prev Professional Automotive Repair Technical Discussions for August 8, 2006
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Open Help Requests for GM
Help Request Answers
1998 Buick LeSabre Custom 3.8L MIL Lamp on VIN: 1G4HP52K4W
I have been stuck on this one for a while now. I have a code P0446 telling me there is a restriction in the evap vent system. I tried to look back of other help requests but have gotten nowhere. My question is why is the FP sensor always reading pressure. Volt... Trouble codes: P0446 (Evap vent solenoid blocked)
1988 Cadillac DeVille 4.5L sets ac codes VIN: 1G6CD51559
Came in blown compressor. Installed NEW compressor and accumulator, orifice and retrofitted to 134A 2.5 lb, 8 oz PAG 150. Problem is BCM thinks the pressures are too low and shuts off the compressor. I read the archives and some said that a new PROM for the BC...
1998 Cadillac Seville STS 4.6L stability system VIN: 1G6KY5499W
Hi Folks The service stability system flashes on the information center but, there are no codes. Not sure where to go from here.
1954 Chevrolet Bel Air 235CID shifter VIN: 4106951717
Car is hard to shift and I am not familiar with a 3 speed column shifter can anyone help. Especially hard to shift into first after going through the gears and then stopping.
1993 Chevrolet Lumina 3.1L parasitic draw VIN: 2G1WL54TXP
Hello, Vehicle cam in not charging, replaced alternator fixed charging concern but has parasitic draw. Pulled fuses found the 60 amp circuit on right fender was the circuit. Looked in Alldata, faxed Alldata they could not tell me what the 60 amp fuses powered?...
1995 Chevrolet K1500 5.7L Cuts out, Stall, MIL Lamp on VIN: 2GCEK19KXS
This truck came in today and I can already tell that it's going to be a nightmare. You drive it and it runs fine. Then for no reason, it shuts off. Like it lost everything. Then it starts running again. I don't do anything. I'm cruising along at 15 or 35 or 55... Trouble codes: 15 (Engine Coolant Temperature ECT Sensor Circuit High Low Temp.), 34 (Manifold Absolute Pressure MAP Sensor Circuit Low High Vacuum), 35 (Idle Air Control IAC Error), 54 (Fuel Pump Relay Circuit Low Voltage)
1997 Chevrolet Cavalier Z24 2.4L MIL Lamp on VIN: 1G1JF12T1V
Hello, We have this cavalie that sets the MIL light and ETS light at same time. Po442 code sets. First testing showed leak at fuel cap with smoke machine. Code cleared and sent on it way. Lights came back, rested system. No leaks found with 1psi tester. All s... Trouble codes: P0442 (Evap control system small leak detected)
1999 Chevrolet K1500 Suburban 5.7L Excessive Emissions, Poor Idle Quality, Hesitation, Surge, Misfire, MIL Lamp on VIN: 3GNFK16R8X
Hello guys, this suburban come in for non start by bad fuel pump and by mil on P0300, engine was able to start sometimes, and found misfiring cyl 4 ,plug was fouled by oil by worn valve guides. After install new fuel pump,fuel filter, spark plugs and new head ... Trouble codes: P0300 (random misfire)
1999 Chevrolet K1500 Suburban 5.7L Rotors VIN: 1GNFK16R9X
This Suburban has a history of brake induced shimmy, I got it at the end of June with warped front rotors and rear drums, even wear on the friction material. Checked master cylinder and hoses and al suspension componets and proceeded with new premium rotors, p...
2000 Chevrolet Silverado 1500 5.3L speed sensor VIN: 1GCEK19T4Y
The vehicle had exhibited classic abs brake activation at low speed (under 10mph) customer cleaned front brake abs sensors per bulliten, problem reoccured in a week with code for right front speed sensor(customer not sure of correct code #). Both front wheel s...
2000 Chevrolet Malibu 3.1L No Start, HARD START VIN: 1GND52J8Y6
This ones a little strange . One of my techs started working on this and it started out as a classsic ign switch probelm ,anti theft light coming on ect, he replaced the key tumbler and switch ,was good for a few days then acting up again with out the anti the... Trouble codes: P1626 (loss of class 2 data)
2001 Chevrolet Silverado 2500 HD 6.6L No Start VIN: 1GCHK23171
This truck originally came in for an erratic fuel gauge.Found a TSB for erratic fuel gauge/no start on alldata.Recommended repair is to replace sending unit.On road test before any repairs were done truck seemed to lack power a couple of times.Just as I got ba... Trouble codes: P0094, P0380
2003 GMC C7500 6.6L Nothing VIN: 1GDM7D1C53
Can't shut off Oil Maint Light,via Manufacters procedures. Could use help on an easy solution,and procedure.
1994 Oldsmobile Cutlass Supreme 3.4L convertible top VIN: 1G3WT35X9R
This vehicle is owned by a relative.The top will go down normally,but will not go up without assistance.I can see fluid lines behind the pass rear window,but cannot locate any repair info.All data online is no help and there are no local olds dealers around.I ...
1999 Oldsmobile Silhouette GL 3.4L radiator VIN: 1GHDX03F8X
Hello! I want to first thank you for any help that I may recieve. I have a 1999 Oldsmobile Silhouette. It came in with oil in the cooling system. There was no coolent in the crankcase. I suspected a head gasket, because the owner had the problem before, and it...
1965 Pontiac GTO 6.5L expansion valve VIN: 237275P324
We are working on this beauty and one thing we need to do is replace the expansion valve. I don't think I have ever had to do this before or those brain cells have long left me. The thermal bulb goes back into the wheel well. Do I remove the inner wheel well t...
1998 Saturn SL 1.9L Starting VIN: 1G87F5285W
this vehicle is dumping excessive fuel causing it to flood and not start or rough start. can start when throttle is open. have changed fuel filter/pressure regulator, have checked canister purge solenoid(can't see or smell leak or excessive fuel),have checked ...
2002 Saturn SL2 1.9L transmission VIN: 1G8ZK52792
this car will drive good until it is warm when it begins to slip in 4th gear. it is as if at cruising speed the car is placed in nuetral momentarily. it will ease back in gear on it's own without any action taken. very seldom does it slam into 4th gear but it ...

Fixes & Summaries for GM
Fix/Summary Answers
1997 Cadillac Eldorado 4.6L Magnsteer VIN: 1G6EL12Y2V
The customer went to the dealer, where a 'friend' worked, and HE diagnosed it as a bad ebcm- which he replaced for about 1500 dollars. YIKES ! I told him that i thought the pump was at fault, but he went with the controoler instead. Oh well-now he is back with...
2000 Cadillac Eldorado ESC 4.6L brake pedal VIN: 1G6EL12Y1Y
With the new ABS computer in hand, we did one more inspection of just trying to spin the wheels this time there was noticable resistance in left wheel. We took the wheel off and everything looked ok,but when we pulled the caliper off the inside brake pad came ...
2000 Chevrolet Malibu LS 3.1L compressor VIN: 1G1NE52J1Y
This was posted by one of my techs who has never used this site and does not do very much diagnostic work. The problem with this car was the high side pressure switch at the right front, near the condenser was bad. The signal voltage on the three wire switch w...
2001 Chevrolet Tahoe 5.3L Gauges return to center after removing key within VIN: 1GNEC13T71
Thanks to all that took the time to help...the problem was in the amplifier...i replaced it with a known good one and the total draw is 202 mA when all the modules goto sleep...for some reason this helped the crtsy light relay from getting so hot as well...? g...
2002 Chevrolet Astro LS 4.3L No Start VIN: 1GNEL19X62
OK the problem was the fuel pump, scoped it and the pattern was very iratic.The check engine light started working most of the time,so not sure what that was about...3 weeks and all is well,Thanks for the ideas.
1986 Oldsmobile Cutlass Ciera LS 2.5L Charging VIN: 1GA3AJ35R5
Thanks for the responses. replaced the alternator power feed , connector and fusable link at starter and now charges at 13.5 volts. thenks Mike P
1999 Oldsmobile Bravada 4.3L Hesitation VIN: 1GHDT13WXX
Thanks to all who replied, many went straight to ignition, and i am sure after seeing my fuel pressure numbers and all, most thought i had that covered completly. Well i guess this system is quite sensitive to pressure, by the next day the truck was running mu...
1999 Oldsmobile Alero GL 2.4L MIL Lamp on VIN: 1GN3NL52T5
thanks to all who replied. some suggested wires and grounds. others pointed at igntion switch. 1 suggested replacing tps. the customer has gotten upset with the fact that his diagnoisis of the tcc solonoid did not fix his problem and the car has not returned. Trouble codes: P0122, P0724.
2001 Pontiac Sunfire SE 2.2L odometer VIN: 2JB5244172
thanks to joe-jon-randy-paul-emest we have a fix! must be a comon problem,replaced the cluster with a used one and all is well. the bcm stores the mileage so there isnt a reflash required. thanks dale.
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