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Prev Professional Automotive Repair Technical Discussions for May 27, 2009
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Open Help Requests for GM
Help Request Answers
1998 Cadillac DeVille 4.6L Anti-Theft VIN: 1G6KD54Y1W
Got this DeVille driving me nuts. Has the digital dash with the car will not start message in the message panel. Well aware of the problem with the ignition cylinder wires breaking. Removed the cluster and ohmed the wires thru the switch and they ohm out perfe...
1989 Chevrolet Camaro Iroc-Z 5.0L Rear Brakes VIN: 1G1FP21E2K
This rs camaro came in for New York State Inspection but failed because it could not stop the dyno. Even under heavy pressure it would barely slow the dyno. I took pressure readings and I have 750 leaving the master, 500 leaving the proportioning valve, and 50...
1994 Chevrolet C1500 Suburban Silverado 5.7L Blower VIN: 1GNEC16K9R
This vehicle has low air volume at the face vents only. The cooling system works great & is full of freon. There is not enough air volume to cool the vehicle. The system will switch from face to defrost to floor just fine. The floor vent and defrost vents appe...
1997 Chevrolet Camaro 3.8L not sure VIN: 2G1FP22K5V
I hate to be asking for help on something that should be so basic. I have a Camaro here that holds refrigerant about 2 weeks before it looses enough to not cool. Charged this car and added dye last summer. The owner called & said it was not cooling again. She ...
1998 Chevrolet Blazer 4.3L overheating
this is my personal truck and whenever it is warm outside when sitting at idle truck heats up when start moving again it cools off. no traces of coolant on motor, or any puddles under truck. has anybody run into this before
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
2002 Chevrolet Trailblazer LS 4.2L brakes VIN: 1GNDT13S42
brakes drag and eventually lock up. booster is good, master piston is not stuck foreward.hoses not deteriorated. fluid clean and tested good. brakes lock up and if you stop the vehicle and pump pedal with car off it will release.disconnected the fuse for abs, ...
2002 Chevrolet Trailblazer LS 4.2L brake lockup VIN: 1GNDT13S42
update. master is disconnected from booster and still the brakes are stuck on.
2003 Chevrolet Silverado 1500 5.3L MIL Lamp on VIN: 1GCEC19T83
Ok chevy guys. I thought I had these EVAP issues pretty well covered on Chevy's, but I was wrong. Code 442, small leak detected. Smoked entire system, no leaks found. Pulled out fuel tank and smoked, nope. Vehicle does have updated bulletin done with the vent ... Trouble codes: 442 (Small Evap Leak Detected)
2005 Chevrolet Impala 3.4L gauges VIN: F52E759205
this is a police car,we put transmisson in it but the problem was there before we worked on it. gas needel peged over to the right,the temp gauge peged also,we un hooked battery to see if it would go back,i dont know if its a small trick or what.how can i fix ...
2000 GMC Savana 3500 6.5L Stall VIN: 1GTHG39FY1
Hello all, This van came to me about a month ago with the complaint of intermittent stall. Customer stated that it would shut off like someone turned the key off. I have not been able to get it to act up while I have had it. It may not restart for a while aft...
2000 GMC C3500 Sierra SL 6.5L Excessive Emissions, Hesitation, MIL Lamp on VIN: 1GDKC34F5Y
Lots of black smoke no power,no turbo.P0236 was hard code when came,Pinpointest wastegate solonoid,can operate with scanner on and off,have 15-17 inches of vac at boost solonoid and at wastegate,actuator and rod moves freely. Boost press always at 14-15 P.S.I.... Trouble codes: P0236 (Turbo boost control)
2003 GMC Sierra 3500 SLE 6.6L No Start, hot no start VIN: 1GTJC33153
the problem has been gradually getting worse cold the truck starts fine it will run all day no problems but if you shut it off even 4 5 minuts it will not restart untill it gets cold if i give it a quick shot of eaither it will fire right back up parts cost to... Trouble codes: P1093
2004 GMC Yukon SLE 5.3L MIL Lamp on VIN: 1GKEK13TX4
Hey guys. I need some help with this one. This truck came in to our shop the other day with a check engine light. Codes P0171 and P0174 were found. First, I checked all the basics. Fuel pressure, volume, engine vacuum, intake duct leaks, smoke tested the int... Trouble codes: P0171 (Bank 1 Too Lean), P0174 (Bank 2 Too Lean)
2004 Saturn Vue 3.5L Misfire, MIL Lamp on VIN: 5GZCZ53474
Thanks for your help, Customer is complaining about hesitation under load. Misfire data showed 3k plus misfires per cylinder in history but nothing shows in live data, new spark plugs, checked coils, no problems found. Vehicle drives fine until minimal load ... Trouble codes: 301 (misfire 1), 302 (misfire2), 303 (misfire3), 304 (misfire4), 305 (misfire5), 306 (misfire6)

Fixes & Summaries for GM
Fix/Summary Answers
1985 Buick Century Limited 3.0L Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, Misfire, MIL Lamp on VIN: 1G4AL19E8F
Hey everyone.Thank you all for the info you offered.This ended up being the timing components.Brought it up on top dead center and pulled the cap.Sure enough 2 teeth off.pulled and restabedthe dist.Ran better until my tech called me to tow him back.Came comple... Trouble codes: 42 (electronic spark timing problem), 34 (map sensor circuit problem).
1994 Chevrolet Camaro 3.4L Poor Idle Quality, High Idle VIN: 2G1FP22S4R
Hello all sorry it took so long, but anyways thatnk you for all your help to those that responded. I did not fix this vehicle the customer has just had enough of this car and decided not to fix it at this time. I was leaning more towrds the mating issue of t... Trouble codes: 35 (Idle Control Error).
1998 Chevrolet S10 2.2L MIL Lamp on, VIN: 1GCCSA942W
I want to thank you all for your assistance. All your suggestions were good and helped me here and in the future. The problem was a bad coil. Even tho it worked adn the plug fired I noticed one coil was replaced and the other wasnt so for 25 dollars i decid...
2000 Chevrolet Astro 4.3L ebcm VIN: 1GNDM19W7Y
Hey everyone, Thanks for the help. I cleaned the grounds @ the rear of the left head, with no fix. I then replaced the EBCM and found 2 of the soleniods were broken. Thanks for all the help, you guys are a life saver. Mitch
2001 Chevrolet Impala LS 3.8L No Start, MIL Lamp on VIN: 2G1WH55K01
Hay sorry this took so long like I said originally this was a job from another shop so it was bounced back and forth a few times but it is fix and been gone and back on the road now for 2 weeks now for the fix like a few of you suggested to try was a bcm I did... Trouble codes: U1000 (data line), U1016 (loss of pcm data line), P1631 (theft code).
2002 Chevrolet Suburban 1500 LS 5.3L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on VIN: 3GNEC16Z82
My tech removed the front o2 sensor and found the catalytic converter is clogged. Most likely the converter is clogged from a rich condition from an injector leaking. Thanks to all who replied. Trouble codes: P0300.
2002 GMC Sierra 1500 SL 5.3L battery light VIN: 1GTEK19T72
All the information given was very useful. After checking battery again and found no problems I cleaned all power and ground locations on the battery and Alt. I checked all connections to the Alt. and made sure all was tight to the Alt. and PCM. Kept truck for...
2004 GMC Yukon XL 1500 SLE 5.3L Fuel Filling VIN: 1GNEK13R64
18 replies that were all very similar. Disconnect the lines to the vent solenoid and then dispense gas into vehicle. If it now flows it's a stuck vent solenoid.. Also there's an updated vent solenoid with a separate filter assembly that's available. The update...
1996 Pontiac Grand Am SE 3.1L shift lever VIN: 1G2NE52M5T
First of all I want to thank all of you guys that read the help mails and do your best to help others. We all been there. This problem was really sneaky. It was blowing the fuse really intermittantly. One day I got lucky when I was going to move the car out bu...
2006 Saturn Ion-2 2.2L MIL Lamp on VIN: 1G8AZ55F56
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