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Prev Professional Automotive Repair Technical Discussions for February 4, 2010
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Help Request Answers
1995 Buick Riviera 3.8L No Start VIN: 1G4GD2213S
Car came in flooded last week. Removed all spark plugs cleaned excess fuel and made car start ran poorly. Found egr gasket leaking vacuum. Replaced gasket and all 6 spark plugs. Car started in the morning and ran fine for 4 days. Yesterday customer tried to go...
2004 Buick LeSabre Custom 3.8L and locks VIN: 1G4HP54K14
Vehicle came to shop with RF,RR,and LR power windows and locks inoperative. Pulled codes U1161, U1162, U1163, and U1170. Unable to reset U1162 and 63. right front window and lock functioned normally when it wanted to (U1161 would go to history when they worked...
1997 Cadillac DeVille d'Elegance 4.6L Ride Control VIN: 1G6KE54Y6V
HELP Another crapalac Customers complaint/ rear suspension not working, As per GM's schmatic at the level controller 5 wires Orange=Batt voltage Pink=Switch batt voltage Yellow=control ground to pump relay White=ground control to vent relay Black= Ground I hav...
2008 Cadillac Escalade EXT 6.2L wiring
FRONT LEFT ACCIDENT There are several blue wires which appeared to be looped at the front drivers headlight loom, most of these wires were severed completely Does anyone know what they go to, or if they can just be connected randomly, two wires have ground pre...
1986 Chevrolet K20 Suburban Silverado 5.7L Excessive Emissions VIN: 1G8GK26M1G
hi guys,this truck is failing for nox at 15 and 25,port in manifold is plugged,customer does not have the money for manifold removal and i don't work on this old of a vehicle very often-which way does the port go into the manifold so i can try to poke it clear...
1996 Chevrolet C1500 Silverado 5.7L Misfire VIN: 2GTEC19R7T
I have a 1996 Chevy C1500 5.7 that has a misfire on #6 all the time. Truck runs great under acceleration just misfires at idle in gear or park. I have a genisis that shows a #6 misfire count all the time, and the truck idles rough. I have replaced two o2 senso... Trouble codes: P0300 (Random misfire)
1999 Chevrolet S10 4.3L Engine VIN: 1GCDT19X0X
I searched the archives and found lots of requests and replys that would or could apply to this job, I never did find exactly what I was looking for. So here I sit, operating the keyboard instead of the mouse. I cant count how many engines I have removed and...
2000 Chevrolet Blazer LS 4.3L Misfire VIN: 1GNDT13W1Y
Hi Guys And thanks in advance. This vehicle has a random multiple mis-fire in all cylinders. A tune up was done at another shop. All the goodies were replace. I remove a couple of plugs just to check if they were wet and they were not, plugs nice and dry. I su... Trouble codes: P0300 (multiple miss-fire)
2000 Chevrolet Malibu 3.1L Poor Idle Quality, Cuts out, Stall VIN: 1G1NE52J7Y
Hello, i have a malibu that wont stay running. Originally this car came in overheating with a blown headgasket, both heads and gaskets were replaced as well as intake gaskets. Started the car and ran it until the thermostat came open and the fans came on, abou...
2002 Chevrolet Trailblazer LS 4.2L Power steering VIN: 1GNDT13S42
This truck has no power steering when you turn to the right.Power steering works fine when you turn to the left.We replaced the power steering pump,checked the u joints in the steering shaft,rotated the tires , replaced the belt and checked the front end,and a...
2007 Chevrolet Impala LT 3.5L Transmission VIN: 2G1WT58K17
This is so weird. Need to know it any one had this happen to them or mite know how this would happen. Car came in for engine light check for codes, found code for large evap leak. Used smoke and found vent valve not closing. Ordered part and got next day. Inst...
2007 Chevrolet Avalanche LT 5.3L MIL Lamp on VIN: 3GNEK12397
This vehicle sets a P0481 code intermittently. Working through the diagnostic procedure provided by Alldata results in the observation that the control circuit to cooling fan relay 2 ( high speed ) has a good feed and a good control circuit to the PCM, the fan... Trouble codes: P0481 (Cooling Fan Relay 2 Control Circuit)
2000 GMC Yukon SLE 5.3L Cooling Systems VIN: 1GKEK13T5Y
For the GM techs here. We working on a Yukon with a 5.3 engine. Vehicle came in with a lost of coolant, with no external leaks, no overheating. Pulled head and sent to Machine shop, found cracked in cylinder head. OE cylinder head gasket is identical to one an...
2005 GMC Safari SLT 4.3L rear hvac unit VIN: 1GKET16SX5
hello this veh has rear radio hvac control unit,radio guy replaced control head unit w/3 different ones and they all would control radio and hvac symbols would come on and blink a few times and go off!i ordered unit from dealer and still does same thing radio ...
2002 Oldsmobile Alero GL 3.4L MIL Lamp on VIN: 1G1NL52E32
catalytic converter has been replaced twice / there are no additional pcm codes present-o2 sensors are working correctly-is there a possible pcm update for this condition. Trouble codes: P0420
2002 Pontiac Grand Prix GT 3.8L Misfire VIN: 1G2WP52KX2
Hello all, Thanks for reading my request. This car came from a referal from a local (Reputable) trans shop. The owner is having problems when the car is warmed up and trying to pass other cars on the highway. At that time the complaint is a miss. The trans sho... Trouble codes: P0300
2006 Pontiac Grand Prix GT 3.8L Unknown VIN: 2G2WP52264
This one has me scratching my head. When you turn the ignition on the DIC displays a message SERVICE VARIABLE EFFORT STEERING after retrieving codes found that it had two codes for ABS C0110 pump mtr ckt and a c0040 RF wheel speed sensor ckt also a C0450 steer...
2006 Pontiac G6 2.4L MIL Lamp on VIN: 1G2ZF55B26
unable to find spec. for heater circut .my otc scanner shows .620amp draw on rear o2.i have ck wire from fuse to sensor and computor to sensor with headlight.maybe needs reprogram Trouble codes: P0054

Fixes & Summaries for GM
Fix/Summary Answers
2002 Chevrolet Cavalier LS 2.2L Fuel gauge VIN: 1G1JH52F42
Changed fuel pump manufacturer, went to OEM rebuilt. All good
2005 Chevrolet Cobalt 2.2L Ignition VIN: 1G1AK12F45
Thanks everyone it was the transmission shifter that was the problem!!!
2004 GMC Yukon Denali XL 6.0L tpms VIN: 1GKFK66U84
NOt fixed , but learned something which is always useful. I did have the correct sensors, there was no sensor in the spare, moving the tire to other positions didn't change anything ( low pressure from this sensor followed). I had a chance to see the an...
2002 Oldsmobile Alero GL 2.2L Heater Core VIN: 1G3NK52F42
Thanks to every one that resonded i went ahead and repaced the valve in the t stat housing and replaced the t stat while i had it apart. after i got it back together it took me a good hour to bleed the system i had to pull the pulg out of the bottom of the wat...
1999 Pontiac Firebird Formula 5.7L Excessive Emissions, Poor Fuel Economy VIN: 2G2FV22G0X
The bird has flown the coup. After rechecking the alternator, thanks to Todd for all the info on that, and even removing it from the vehicle to no avail, I sent it out to the dealer for a computer reprogram. And sure enough that did it. Reprogram the ECM and r... Trouble codes: P1637 (Generator L Terminal circuit).
2000 Saturn SW2 1.9L Excessive Emissions, MIL Lamp on VIN: 1G8ZN827XY
We did get the opportunity to repair this vehicle. Our customer was not able to afford to replace the fuel injectors and picked up the car. Thanks again to everyone who replied.
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