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Prev Professional Automotive Repair Technical Discussions for February 16, 2006
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Open Help Requests for GM
Help Request Answers
1998 Cadillac DeVille 4.6L Radio VIN: 1G6KD54Y5W
I've searched the owners manual and Alldata, but I can't find out how to set the clock back to standard time from Military time. I tried drivers presets and the home and away presets.
2000 Cadillac Catera 3.0L Unknown VIN: W06VR54RXY
Need A Little Cadillac Help. This Car Has No Defrost. All The Air Comes Out The Dash Vents, No Codes With Tech 2. Running Test With Tect 2 Scanner Shows Modes Are Working But All The Air Still Comes Out The Dash Vents. One Manual Shows Vacumn System And Anothe...
1991 Chevrolet Corvette 5.7L Poor Idle Quality, Misfire VIN: 1G1YY2385M
We have this 91 Corvette in the shop driving us crazy. As it warms up it gets a pretty severe misfire at idle. It's not a consistant dead hole, it just seems to intermittantly loose a cylinder. The rpm's will drop almost to the point of stalling, then the idle...
1994 Chevrolet S10 Blazer Tahoe 4.3L No Start VIN: 1GNDT13W3R
vehicle was towed in as a no start. cranks good. diagnoised bad fuel injector assembly. vehicle sat on lot till bill was paid (about 2 monthes). we started it from time to time, now the customer has paid his bill and we went out to start it for him and same pr...
1996 Chevrolet K1500 5.7L MIL Lamp on VIN: 1GBEK19R3T
This truck keeps setting numerous codes. The problem started when we replaced the engine last week. I never checked codes before pulling engine but light was not on. After a day of driving customer came in and truck had P0161 only, came back a few days later s... Trouble codes: P0161 (02 heater ckt bank2 sensor 2), P0154 (low 02 activity bank2 sensor1), P0102 (maf signal low), P0155 (02 heater ckt bank2 sensor 1), P0135 (02 heater ckt bank1 sensor 1)
1998 Chevrolet C1500 Cheyenne 5.7L No Start VIN: 2GCEC19R7W
this truck came in on the hook, only had 30 psi fuel pressure, replaced pump, and connector harness at pump. intake was leaking, sold intake job, while we had it apart, pressurized fuel system to look for leaks in spider assy, none found. fuel pressure bleeds ...
1999 Chevrolet Silverado 1500 5.3L front axle, transfer casenois VIN: T8XZ111047
customers complaint is a low pitched rumble from feft front starting at 45 mph. i originally isolated it to the front axle, found bad left carrier bearing. changed all front axle bearings, reinstalled front axle, noise is still there. removed transfer case, di...
1999 Chevrolet Tahoe LS 5.7L No Start, Poor Idle Quality, Stall VIN: 1GNEK13R9X
Greetings GM techs, this Tahoe came in with antif. leaking at lower intake manifold. replaced manifold and gaskets. now no leaks, but vehicle starts and runs well for about 1 to 2 min. then slowly dies and stalls. no codes, fuel press slowly drops from about 5...
2001 Chevrolet Blazer LS 4.3L fan clutch VIN: 1GNDT13W51
hey iatn, the problem i am having is the cooling fan for the engine is spinning to fast when engine is cold, it produces a roaring noise until the engine warms up. the vehicle was in a minor accidend and we replaced the fan and clutch with a carquest parts. ...
2003 Chevrolet Express 1500 5.3L driveline? VIN: 1GNFH15T33
Attention all Chevy Gurus!!!Customer complaint of a hesitation on level surface after taking off from a dead stop-Actually I test drove it and it is more of a clunk or light bump sensation when taking off from a level surface after a dead stop, and it feels li...
2003 Chevrolet Suburban 1500 LS 5.3L Poor Idle Quality
Came in with low rough idle and codes P0171 and P0174. Found intake gasket leaking. Replaced intake gaskets and injector o-rings. Fuel trim is now fine and idles smooth but still low (500rpm). Customer complains that it's just the same as it was. All(No)Data ...
1996 GMC K1500 Suburban 5.7L 2-3 shift VIN: 1GKFK16R7T
Hello, This is my Suburban and I am having problems with the 2-3 shift. It won't shift from 2 to 3 while driving normal to hard. When in the morning or after it has cooled down it won't shift out of 2nd unless you back off the gas for a little bit and then it ...
1997 GMC K1500 Sierra SL 5.7L Excessive Emissions VIN: 1GTEK14R5V
same as above Trouble codes: P0102 (mass air flow), P0340 (cam sensor)
1997 GMC Savana 2500 5.7L Hesitation, Cuts out, Stall VIN: 1GTFG25RXV
It's back to haunt me!!! This van came in three weeks ago with a stalling condition when you press on the gas peddle. If you nursed the gas peddle (feather it) you could build up speed, but if you hit the peddle just half way the engine would die. I checked th...
1988 Oldsmobile Cutlass Ciera 3.8L No Start, Cuts out
Sorry no VIN is available to me, but I do remember the engine code is a "3". Original complaint is the vehicle would cut out and not restart immediately. Would restart within 20 min according to customer. Initially I never did get it to act up, but a week late...
2003 Oldsmobile Alero GL 2.2L ignition or antitheft system VIN: 1G3NL12F63
Hey all, This car has an intermittent starting condition. Totally unpredictable. Scanned for codes and came up with U1000 and U1088 under history codes. Owner has replaced fuel pump andCrank sensor. Cranks but no start;runs well when it starts. Checked the ar...
1988 Pontiac Firebird 5.0L Cuts out, MIL Lamp on VIN: 1G2FS21E8J
This one is a PIP ! The closer to the repair facility, the less often it occurs. the customer, prior to giving it to me, replaced damn near everything. ECU, ESC, Knock Sens, Coolant Sense, distributor, C-R-Wires, and a partridge in a pear tree. We get with a ... Trouble codes: 43 (ecm low voltage at esc / knock sens 5 seconds)
1996 Pontiac Sunfire SE 2.2L no spark or fuel VIN: 1G2JB124XT
checked wiring to ecm was corroded-2 wires one communication and one ground.repair.fuel pump working no injector pulse.r&r crank sensor,cam sensor,ign.mod. and ign switch.confirmed all parts good intake and output sides.we had andother 96 sunfire in at same ti...

Fixes & Summaries for GM
Fix/Summary Answers
1988 Buick LeSabre Limited 3.8L Poor Idle Quality, hard start VIN: 1G4HR54C2J
thanks for everyones input after checking the coil pack i determine the module under it was the problem replaced it runs great per the customer thanks to all again mark
1992 Chevrolet Caprice 5.7L Stall VIN: 1G1BL8370N
Well, it wasn't an ignition issue at all. As it turned out to be, the vehicle was starving for fuel...we replaced the fuel pump. Car hasn't been back since! Thanks for all the help guys!
1992 Chevrolet S10 Blazer Sport 4.3L Rear Brakes VIN: 1GNDT13W0N
After going over all the replies, and discussing everything with the customer, he decided to repair it himself. Just got the final word from the owner. After replacing all the steel lines and hoses, he completely removed the ABS unit and OE proportioning v...
1993 Chevrolet Lumina Euro 3.1L No Start VIN: 2G1WN54TXP
first i want to thank everyone who replied. first i reinstalled original ecm and referance voltage went down to 5 volts from the 12 volts i was getting. then found that the reprogamable cartriges in my snap on scanner was giving me all the codes & wrong data, ... Trouble codes: 14 (coolant sensor high temp), 15 (coolant sensor low temp), 16 (system voltage high), 17 (camshaft sensoe error), 21 (tps voltage high), 00 (plus other codes).
1996 Chevrolet K1500 Cheyenne 5.0L high idle VIN: 1GCEK19MXT
after customer decieded to get a second opinion, tried to reach him a couple of times to find out what ever became of it, hasn't got back to me yet, you can't win them all i guess. Thanks for all your help
1997 Chevrolet Cavalier 2.2L pcm/alt VIN: 1G1JC5242V
Thank you to all that helped.The info on flatrater.com was very useful.It turn out to be a bad alternator after all. I replaced the unit w/quality a/m unit but it still didnt charge,so I took it to a local rebuilder for a bench test he confirmed alt bad.Replac...
1999 Chevrolet Cavalier 2.4L abs pump VIN: 4G1JF32TOX
I told the customer the price of anew gear assembly for the lower part of the abs unit and at this point the customer neglected to do the repair but thats wher his problem was.
1999 Chevrolet Malibu 2.4L module VIN: 1G1ND52T6X
This car is fixed. You know the old saying that you can not see the forest for the trees, well this was our problem. 8 out of the 10 replies recommened changing the LF speed sensor due to the code. We decided to hook up the new sensor without installing it jus...
2000 Chevrolet Venture 3.4L unsure VIN: 1GNDX03E9Y
Well everyone most of you were right,it was the cheap hub bearing! Extra thanks to Bruce,your the one that made me think about swapping sides.At some point you get pissed off because you would think that a noise that loud would be easy to find and you get lost...
2001 Chevrolet Silverado 1500 5.3L shift solenoid VIN: 2GCEC19T21
sorry about the late close on this one. i just decided to send the truck to the transmission shop for a overhaul.i thought they might have more information than i had. thanks for all the replies
2004 Chevrolet Silverado 1500 5.3L Tire size VIN: 2GCEK19T54
Thank you all that replied. Most of you said I would have to recalibrate the computer, otherwise I might have a problem with the trans and abs system. Some said it would not be a big enough change to even worry about, well, I also put a call into GM assistance...
1992 GMC K3500 Sierra 5.7L down shifting to 3-1 only on decel VIN: 2GDHK39KXN
I would like to thank every one for taking the time to read my problem and give me there advice. Most answers were directed to the mechanical workings of the trany. One was for a fuse, we checked all fuses and they were good. MY service advicer went back to th...
1993 GMC Sonoma 4.3L transfer case VIN: 1GTCT1928P
Last night I left the tccm disconnected. many of you told me to leave the battery disconnected for a period of time.This morning I reconnected everything and the 4wd works fine.Go figure!It just needed time to reset itself.Thanks to the 7 members who responded
1991 Oldsmobile Cutlass Supreme 2.3L ing.spark from timin VIN: 1G3WH14D1M
the person did not want in stall crank shaft damper,i do think this would solve the the elec. spark.since i clean the grounds, the was a lot less, change it by 80%
1997 Saturn SL2 1.9L Head VIN: 1G8ZK5279V
I received many helpful responses and looked into all of them. Dennis, Ed, Len and Ted mentioned head a constant issue on these vehicles. Dennis mentioned to pull valve cover pressurize cooling system and look for coolant seepage around cam bosses. We followed...
2000 Saturn LS2 3.0L Heater VIN: 1G8JW52R0Y
I got 8 replies on this vehicle. Most said the heater core was clogged. We flushed the heater core & air temperature was 134F.. Thanks to all the people that took the time to help.
2000 Saturn SL1 1.9L Poor Idle Quality VIN: 1G8ZH5285Y
Thank you, to all of you who took time to reply. As many of you suggested we checked for a cracked ect sensor. It looked to us that the plastic was separating from the brass. So we replaced it with the redesigned sensor and so far so good. Trouble codes: P1624 (Snap shot available).
2002 Saturn Vue 2.2L Rack/electronic steering VIN: 5GZCZ23D92
I inspected sway bar frame bushings, rack ends, intermediate steering shaft and column. Did not isolate noise, suggested sliding intermediate shaft off rack and retest noise. The customer decided not to proceed at this time. Plans to reinspect in 1500 miles or...
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