GM Automotive Technicians Technical Discussion and Fixes for May 28, 2009

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	Help Request	Answers
	2002 Buick Park Avenue 3.8L Cuts out VIN: 1G4CW54K72 Traced original code PO102 to problem with PCM--replace and flashed PCM. Then found intermittent loss of communication with the scan tool--like turning key off--replaced crank sensor, eventually ignition switch. With other maintenance have replace plugs, pcv, ... Trouble codes: P0102	View
	2003 Buick Park Avenue 3.8L abs VIN: 1G4LW54K33 When making stops from higher speeds the vechile acts like ABS braking but the scanner shows its not. Would the Vechile stability enhancement system cause this and how would I go about checking it. All four wheel speed sensors test good scooped with modus and ...	View
	1996 Cadillac Seville STS 4.6L A/C system VIN: 1G6KY5291T Customer felt that the a/c system was not performing as it should, purchased 2 small r134 bottles from autozone, and added both to the car. Customer complaint, A/C is Inoperative, not cold. The Information Console Says "Service A/C System" , and "A/C Compress...	View
	1967 Chevrolet C-10 PKUP 5.7L brake block VIN: CS147B1279 pickup came in being restored.no brake lines leaving brake block.need to know if front brake lines go to front or rear of block.rear to rear of block or other way.truck has mechanical brakes,no power.thanks for help.think front goes to front,but not sure.thank...	View
	1982 Chevrolet Suburban K20 6.2L headlights, dash lights,tail lights,ammeter, radio I'm really sorry to have to post this but im kind of in a jam. This is our yard truck. When I was driving it last night I heard a pop, like a fuse blowing, and the radio, interior lights, dash lights, tail lights, license plate lights, headlights went out and ...	View
	1983 Chevrolet K20 Custom 5.7L master cylinder hydraulics VIN: 1GCGK24M1D this is embarrassing because i can't get a good pedal before pumping pedal 3 or four times - have bleed brakes with vacumn pump, have bleed at master cylinder and bleed all cylinders starting at right rear and working forward.i have toe play but still shimmed ...	View
	1990 Chevrolet C1500 Cheyenne 4.3L Cuts out, Misfire VIN: 1GCDC1428L Thankyou guys in advance for your time. I have this truck that is starting to get really attached to my shop. We previously replaced the camshaft and lifters and timing chain after we found 2 lobes wore off of the cam. Had a dead miss and that problem is gone....	View
	1997 Chevrolet S10 2.2L parking pawl VIN: 1GCCS1441V the trans works ok butt it realy hard to get into park if the truck is sitting still . if the truck rolls a little it will slam into park and hold I,ve droped the valve body to check the gear and the parking pawl evry thing looks ok if the drive shaft is rotat...	View
	1999 Chevrolet Lumina 3.1L ABS module VIN: 2G1WL52M1X hello there. came in with abs light on. code was C1216 -brake control relay coil circuit open. if you shut the car off, the abs light will be off and no codes stored. go for a drive and out of nowhere the abs light comes on and voltage for the abs module goes ...	View
	2000 Chevrolet Express 3500 6.5L Stall VIN: 1GCHG39F8Y Van will quit after driving for a while, customer says he lets the van sit for 5-10 mins and it will start back up and away he goes for a few more miles then it will quit again. There is no codes, and I am not familiar at all with these 6.5L engines. Any help ...	View
	2001 Chevrolet Cavalier 2.2L engine VIN: 1G1JC12431 customer came in saying that she brought her car to the dealer and they told her nothing was wrong but as soon as she left the trac off light came on and the engine hesitated then took off. after this happens three times the battery light,oil light&check engin...	View
	2001 Chevrolet Impala LS 3.8L gear ratio error VIN: 2G1WH55K01 After reinstalling the transmission the gear ratios were inspec for the first 5 miles although they were not steady, bouncing around a few ratios. As the vehical was driven further the ratios went out of specs setting the code again.(P0730). EG. In first gear ...	View
	2001 Chevrolet Malibu 3.1L No Start, Hesitation, Cuts out, Stall VIN: 1G1ND52J01 car seems to stall after 20 mins of driving it wont completely die but just no power and wont take any gas sometimes it will stall and not start for a couple mins then she may run fine or spit and sputter car has a low mileage engine which i know doesnt mean a... Trouble codes: P0300, U1040, P1106, P1189	View
	2004 Chevrolet Impala LS 3.8L Radio VIN: 2G1WH52K64 Hi all and thank you in advance for your help. The radio in my 2004 Impala failed so I got one from a salvage yard to replace it. Found out after I installed it that when it is unplugged from the vehicle the theft deterent is activated and the radio locks. As ...	View
	2004 Chevrolet Trailblazer EXT LT 4.2L MIL Lamp on VIN: 1GNET16S04 this truck was sold saturday customer called saying check engine lite was coming on he went to his shop they said po2101 was code! lite is not staying on all the time but code remains in history along with po1633 freeze frame data is o mph 153 degrees 29% thro... Trouble codes: P2101	View
	2006 Chevrolet Impala LT 3.5L Pump / Fluid VIN: 2G1WT58K36 Hi all, Having trouble with the power steering on this car. Started out with the owner wanting to eliminate the buzzing noise. The fluid was low but I saw no leaks, I put the Lucas addative in and filled it up. The noise didn't go away and now when the motor i...	View
	1992 Geo Metro 1.0L Poor Idle Quality, Hesitation, Cuts out VIN: JG1MR2467L this car came to me after customer changed engine. he had just bought car with a bad engine.he has several of these cars and has alot of spare parts. the problem is car will start ok and idle a little rough but as you run engine up the ignition timing jumps al...	View
	2001 GMC Yukon XL 1500 SLT 5.3L No Start, NO COMMUNICATION VIN: 3GKEC16T61 Hey everyone out there. Hope someone has seen one like this before. Vehicle was towed in with a complaint of vehicle died. Ok simple enough checked spark, fuel pressure and all was in line. Plugged in scan tool and the Modis will not communicate with any modul...	View
	2005 GMC Sierra 3500 6.6L fuel overflow VIN: 1GDJC342X5 This li'l gem was here when I started in January(thats my "I didnt do it" disclaimer) and I was told it was repaired. The history of the truck was that it would run out of fuel in one tank and not read empty or set a MIL or kick the gauge to empty. So the solu... Trouble codes: P2636 (Fuel transfer pump insufficient), P0462 (Fuel level performance)	View
	2006 GMC Sierra 1500 SL 4.3L converter VIN: 1GTEC14X56 truck came in with fault code #p0894 stored in memory. checked tranmsission operation and found that the torque converter rpm slip was to high. have checked and replaced the tcc and pusle with solenoids. replaced transmission pump valve and updated valve body....	View
	1995 Oldsmobile Cutlass Ciera 3.1L ckp VIN: 1G3AJ55M6S engine stalls when hot want to change the ckp whats the best way to replace it cant seem to reach it from the bottom, top or thru the wheel well i have changed the ckp on other 3.1s with no problems thanks	View
	1999 Oldsmobile Alero GLS 3.4L Excessive Emissions, No Start, Poor Idle Quality, Stall VIN: 1G3NF52E7X Hi everyone and thanks! The car came in with an idle problem. Idle surges up and down from 500rpm to about 1300rpm and occasionally stalls when the rpm drops down. Sometime the car will not start unless you hold the gas down about 10%. The car stalls when you ...	View
	1996 Pontiac Bonneville SE 3.8L Cuts out, MIL Lamp on VIN: 1G2HX52K3T Thanks in advance for taking the time to read my message. This is my own personal vehicle that I just recently put an engine in. Car runs and drives just fine and the check engine light poped on with code of p0133 for slow response. So I put a new o2 sensor in... Trouble codes: P0134	View
	2003 Pontiac Sunfire SE 2.2L radio VIN: 1G2JB12F23 Need help please. My 16 year old daughter on her very first trip with her very new driver's license left the car lights on at the mall, when she came back car was dead (this is her sisters car borrowed for the first time)So dad I am to the rescue, jumped car b...	View
	1997 Saturn SL2 1.9L Hesitation, Cuts out, Stall VIN: 1G8ZK5274V After vehicle warms to op temp, on initial [tip-in] accel in gear or in park car stumbles. worse with a/c on. If in gear and very gently accelerated, problem isn't there. if normally accelerated it happens EVERY time and will stall. once car overcomes glitch a... Trouble codes: P1599	View
	2004 Saturn Ion-2 2.2L electric steering VIN: 1G8AM12F54 the saturn ion came in about 5 weeks back with a intermittant lose of the electric power steering. after some testing and trouble shoot chart we replaced the (psm) or the electric power steering column with i used unit.did fine for 1,100 miles now back in with...	View

Fixes & Summaries for GM

	Fix/Summary	Answers
	1989 Cadillac Brougham 5.0L Charging VIN: 1G60W51Y5K A big thank you to everyone that replied to this posting. This vehicle was and will continue to be a thorn in my side. A special thanks to Juan at mecias cadillacs (sorry if I spelled that wrong) for all your guidance. As everyone knows, these cars are an elec...	22
	1995 Chevrolet Lumina LS 3.1L abs lights VIN: 2G1WN52M7S thanks for all of the replies...upon checking grounds... inspection of the fuse terminal...showed deterioration replace fuse terminal...took care of a b s and lighting problem thanks again!!	5
	1997 Chevrolet C1500 Cheyenne 5.7L Delayed Shift and a no start VIN: 2GCEC19R6V Thanks for all the replies and professional advice. My neighbor had the truck towed to a transmission shop. Unfortunately, I did not have all the tools I needed at hand to complete the diagnosis and my neighbor needs his truck for work.	30
	1998 Chevrolet Blazer 4.3L Unknown VIN: 1GNDT13W2W hey guys just want you to know that the fix was the cold hot door was stuck after removing dash and pulling heater box i found the problem thank you to all and god bless	9
	2000 Chevrolet S10 2.2L tcc VIN: 1GCCS1952Y Thank you for the help. I replaced the valve body and wireing with new tc clutch solinoid. found valve was sticking in its bore. Thanks again for help.	14
	2002 Chevrolet Monte Carlo SS 3.8L drivers information center VIN: 2G1WX15K12 Special thanks go to Bradley and Joe for their quick help and wiring diagrams. The Drivers information center wiring is found under Insterment panel gages. Lt green\black Ambient Air Temperature Sensor Signal Black\white Ground Brown ingnition 3 voltage o...	3
	2004 Chevrolet Silverado 2500 HD 6.6L fuel gauge VIN: 1GCHC23134 Sorry took so long,customer needed to drive vehicle and report,thanks to Sean from Utah,It seems system needed to relearn it self,customer states they have gone as far as 25 miles after light has come on.	8
	2005 Chevrolet Impala 3.4L gauges VIN: F52E759205 we fixed the car ,how i dont know.we let car set overnight when we whent to move the car battery was dead,put jump box to it cranked car gauges was working.i guess surge to battery did it.its been like this a year or more got lucky i guess.thanks to every body...	8

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