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Prev Professional Automotive Repair Technical Discussions for November 29, 2005
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Open Help Requests for GM
Help Request Answers
1990 Buick Regal Limited 3.8L Dash lights VIN: 2G4WD14T1L
Hello group, Happy Holidays. This buick is driving me nuts. It came in a month ago with a complaint on no dash lights. This car has a digital dash and the illumination is not working for the radio,fuel gauge,PRNDL etc. when lights are turned on. Seemed to be a...
1991 Buick Regal Gran Sport 3.8L Stall VIN: 2G4WD54L1M
ever 6 to 8 months the car starts to stall every now and then ( it is one of our loaner cars ) every time there is a code 17 (crank signal) i replace it and every thing is ok for 6 to 8 months i was thinking maybe the module or computer is burning it up. all t... Trouble codes: 17 (no crank sensor)
1991 Buick Park Avenue 3.8L Cuts out VIN: 1G4CW53LXM
Had a code 41 according to the scan tool it said to check the cam sensor and into the cam hole for the magnet. It looked to be ok. checked chilton manuel and it told me that to check the cam sensor terminal and that I should have 8 to 10 volts on terminals AB ... Trouble codes: 41 (cam sensor)
2001 Buick LeSabre Custom 3.8L blower motor VIN: 1G4HP54K91
this is the secretary's car and we have no system diag manuals. the blower motor is inoperative. she says it comes on sometimes if she leaves it on, but today it would not come on at all. all fuses are good and we have power to motor. when the black wire at mo...
1994 Chevrolet Astro 4.3L Cuts out VIN: 1GBDM19W4R
hello tech's this one is baffeling us no matter when we have it in the shop it runs perfectly, nice smooth idle good accell and decel, we can't get it to stall, third time (this) we have a code for map sensor curcuit but this could be because the engine lost v... Trouble codes: 34 (map sensor curcuit low)
1994 Chevrolet K1500 Cheyenne 5.7L 1-2 Shift & Overdrive VIN: 1GCEK19KXR
On first start the vehicle will start in first and shift to 2nd and 3rd. Come to a stop and it will remain in 3rd unless manually shifted down but will not go back to 1st, it will then start in 2nd and then go to 3rd. So far we have changed the 1-2, 2-3 and th...
1994 Chevrolet Caprice Classic LS 4.3L Poor Idle Quality, Hesitation, Surge, Cuts out, Misfire VIN: 1G1BN52W1R
customer's complaint is high idle surge and lack of power (engine cutting out or misfiring). had at another shop and they replaced the following: fuel filter, pcv valve, all spark plug's, air filter, water pump, coolant temp sensor, serpentine belt, whole dist...
1995 Chevrolet Blazer 4.3L Stall VIN: 1GNDT13W5S
have a blazer here that will stumble and stall when warm. Is obd II compliant. No codes stored. When it dies, fuel pressure remains, spark remains and injector pulse remains. have replaced the module from another 4.3, fuel pump new 2 days ago.(pressure would d...
1995 Chevrolet Beretta Z26 3.1L Poor Idle Quality, Surge, Cuts out, Misfire VIN: 1G1LW15M5S
Got this car in shop from used car dealer 1 week ago so I dont have any history with is. The dealer said that the car ran great and all of the sudden it ran awful, missing, jerking cutting off. brought car in shop, no codes present, fuel press tested within sp...
1998 Chevrolet Express 3500 5.7L Starting VIN: 1GTHG35R8W
Van towed in no crank no start. Found bad starter installed new now van cranks but, it will crank for half a second and stops like the motor locked up or the timing went way advanced. I turn the key off and recrank it happens again. Sometimes it will crank ali...
1998 Chevrolet Venture 3.4L MIL Lamp on VIN: 1GNDX03EXW
keep getting this code witch is vehiecle specific it needs to see a 02 switch between 300mv and 600mv every 100 seconds the 02 switches but is about 350 to 600 fuel trim is always -5 to -15 long checked fuel pres reg and have no exhaust leaks had 2 diff o2 sen... Trouble codes: 1133 (lack of 02 switching)
1998 Chevrolet Venture 3.4L door locks VIN: 1GNDUO6E1W
hello this van came in with a complaint of stalling and when hitting the door locks the van quits and must turn key off to restart and yes that is exactly what it does I thought it had something to do with the theft system but did not get to far involved also ...
2001 Chevrolet Impala 3.4L security light on VIN: 2G1WF52E11
Security light comes on at times for no reason. Sometimes car has to be driven for twenty minutes before light comes on.Checked codes with mastertech no bcm codes&pcm codes.Car always cranks over&starts ok.Wondering if anyone has seen bcm causing this problem.
2002 Chevrolet Express 1500 5.7L Misfire, MIL Lamp on VIN: 1GBFG15R72
van is in with miss cylinders #6,5,7 checked fuel presure ok koeo62 koer 55. We took compression test ok 150 psi. replaced all 8 injectors and same problem. new fuel filter. when engine is running there is no ticking noise or any noise in engine. just miss. ca... Trouble codes: P0300
2003 Chevrolet Silverado 2500 HD 6.6L No Start VIN: 1GCHK2316F
Has anyone had problems with internal shorts inside the fuel injection control module that causes the fuse to blow? I have tried to follow and wiggled the wires in the harness but have not been able to duplicate the problem of the fuse blowing. This is intermi... Trouble codes: P0335 (Crank Sensor code), U1800 (Loss of cmmunication with the fuel module)
2003 Chevrolet Trailblazer North Face 4.2L Fuse panel VIN: 1GNDT13S03
Customer drives in with complaint of Service Brake System message on Info Panel. Thorough brake inspection, no problems. No SES or ABS lights. Attempt to start engine-no crank. Replaced battery that failed load test, still no crank. Cust then adds that engine ...
1995 Pontiac Grand Prix SE 3.1L alternator VIN: 1G2WJ52MXS
I cannot find anything wrong with the wiring. The voltage drop from battery to the brown wire is .2 volts. Grounds are good. I would love any suggestions. The headlights surge like your at a club or something.
1995 Pontiac Grand Prix SE 3.1L Radio VIN: 1G2WJ52MXS
Can anyone tell me the codes to unlock this radio? The codes I got from the radio are 502 and 505. Thanks in advance.

Fixes & Summaries for GM
Fix/Summary Answers
1994 Chevrolet S10 Blazer Tahoe 4.3L No Start VIN: 1GNDT13W4R
thanks for all helps, I replaced the fuel pump. it runs very good. customer takes the car, never come back. i guess i fix the car. any way thanks for help.
1996 Chevrolet Caprice Classic 5.7L No Start VIN: 1G1BL52P6T
called cust back today and she stated veh has started without any problems after gas cap and ignition cylinder; would have to assume was more related to gas cap thanks to all that helped
1998 Chevrolet Venture 3.4L MIL Lamp on VIN: 1GNDX03E7W
Thanks to all who replied. The problem I finally found was with the electrical connector behind the drivers seat which goes thru the floor and connects to all the fuel tank electricals and the abs. When I took this connector apart I got two tablespoons of wate... Trouble codes: P0440.
1999 Chevrolet S10 2.2L Mechanical VIN: 1GCCS1442X
after inspection of valve train and camshft sprocket, etc. noise is piston slap, cylinder balance test noise is gone on all 4 cylinders
2003 Chevrolet Express 2500 5.3L No Start VIN: 1GCHG39RX2
I dont know what fix this fan, we put a reolay in it (dont think it was the fix) test all wiring, no marks anywheres all tested fine no resitance. put all back together never stalled since.
1993 Oldsmobile Cutlass Ciera 3.3L No Start VIN: 1G3AG54N5P
as most of you said use a gm crank sensor and repaired the problem thanks
2003 Pontiac Montana 3.4L key VIN: 1GMDX03E03
sorry to say i have not been able to pull this van out from under the nice lady that drives it.i guess we are safe as long as she doesn't loose the key. keith wrote that i shouuld check key resistance,this system has no chip visable on key. rich woundered ...
2001 Saturn L200 2.2L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G8JU52F21
Well, thanks for all the replies the coil pack was the culprit. I suspected this due to 1 & 4 missing, but could not prove via the 'quad 4' method, and this was the first I have experienced the wide open fan thing. It just threw me off track. Thanks again, and... Trouble codes: P0300.
2002 Saturn SL1 1.9L tcc VIN: 1G8ZH5D812
electrically all checked out well,therefore we had to re-pull trans and send back to trans shop. there they found 2 problems. a missing o-ring on the input shaft and also 1 missing on the convertor hub. everyone makes mistakes and they (trans shop) have always...
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