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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for February 25, 2005
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Open Help Requests for GM
Help Request Answers
1999 Buick Park Avenue 3.8L drivers front power window VIN: 1G4CW52K1X
Hello all, were running into some trouble with this Park Av. When the weather is cold (below 40 deg's f)the drivers window works very slow at the top quarter of movement, going down and coming up. We've adjusted and lubed just about everything there is, and re...
1994 Cadillac Seville SLS 4.6L Poor Idle Quality, Stall, Hard start VIN: 1G6KS2YXRU
This car came to us with the complaint of hard start first thing in morning when it first cranks it will almost start. Second atttempt sometimes it will start and run rough for a few seconds and die sometimes it will clear out and run. I know this is an old Ca...
2004 Cadillac CTS 3.6L cant get the key out VIN: 1G6DM57764
Ladies and Gentlemen, We are working on this cadillac and we can not remove key from column, checked codes with tech 2, ecm - u1300 all other controllers u1000. checked class 2 line from ecm - ok. cleared all codes, u1300 and u1000 set again. unpluged tps and ...
1995 Chevrolet K1500 Cheyenne 5.0L Hesitation, Surge, Poor Fuel Economy VIN: 1GCEK19H7S
I am working on a 95 Chevy K1500 pickup with a 5.0 "H" engine. This truck has slight hesitation and sluggishness. Scanning the data stream reveals constant knock sensor activity (counts from 0-255 then restarts). As soon as the throttle is moved, with light lo...
1997 Chevrolet Cavalier LS 2.4L No Start VIN: 4G1JF32T1V
this is a no start . Engine is in a flood condition at start up . Will attempt to start with full throttle but at closed throttle to rich for a start .Scoped ignition and can see plugs getting flooded .Map sensor in range and was also subsituted with known goo...
1999 Chevrolet Tahoe LS 5.7L monitors VIN: 1GNEK13R5X
MIL lamp off, no stored trouble codes, monitors not ready and they are o2s, egr, evap, cat...any help would be appreciated.
2000 Chevrolet Astro 4.3L No Start VIN: 1GNEL19W8Y
Came in on the hook. Pulled codes found PO338. Changed cankshaft sensor and engine started. 3 days later the same thing no start with PO338 code. Next morning came in and van runs great no problems. I almost forgot on the first tow in the customer said it was ... Trouble codes: P0338 (ckt int high freq)
2001 Chevrolet Suburban 2500 8.1L No Start, Stall VIN: 3GNK26G11G
My main question is does anyone out there have a scope pattern of the crankshaft sensor on one of these engines? The problem is the engine will die without any warning and start right back up. It set a crank sensor code and I have a scope hooked to it trying t... Trouble codes: P0335 (Crankshaft Position Sensor Circuit)
2001 Chevrolet Malibu LS 3.1L Engine Noise VIN: 1G1NE52J91
Vehicle brought in with a lifter tick type of noise. The noise is coming from the top end of the engine. All 12 lifters were replaced in an attempt to fix problem, but that did not fix it. I read another fix and it refered to a bulletin on the valve springs? I...
1999 Oldsmobile Aurora 4.0L Stall, MIL Lamp on VIN: 1G3GR62C9X
hello everyone and thanks in advance i've got a stall problem with this car mostly but i am also getting strange readings on scan data like 24k miles and car actually has 77k, fluctuating readings with koeo or koer(rpm,tps,pretty much all data fluctuates) can ... Trouble codes: 1599 (stall or near stall detected)
1996 Chevrolet Blazer 4.3L No Start VIN: 1GNDT13W8T
This time car was towed in and would not start at all. Checked for spark and there is spark on all cylinders. Check for fuel pressure and pump is working with 61 pounds of pressure. Checked for injector pulse signals and all connections are showing pulse. Thou...

Fixes & Summaries for GM
Fix/Summary Answers
2003 Buick LeSabre Custom 3.8L MIL Lamp on, VIN: 1G4HP52K23
fixed! one reply led me to a bad ftp, which we had questioned. a new ftp sensor had totally different readings and the car has not been back. it's amazing how much you learn when you have to dig into a problem like this. i now have alot more knowledge of evap ... Trouble codes: P0446 (evap vent performance).
1996 Chevrolet Blazer 4.3L Transfer Case VIN: 1GNDT13W7T
I don't know what I fixed, if anything. I did locate the Transfer Case Module. It is not in the right kick panel, it is behind/near the ashtray. Remove the ashtray & the cover that goes to the left of the ash tray.It is a very plain metal box with no tags or p...
2000 Chevrolet Suburban 1500 LT 5.3L ABS System VIN: 3GNFK16T5Y
Hello iATN! First of all thank you to everyone who took time to respond to my shout for help. I have fixed this vehicle and I could not have done it without you guys! All of the replies stated that 3 mph was normal on scan tool data for minumum readings. I...
2003 Chevrolet Avalanche 1500 5.3L Axles, brakes, shafts VIN: 3GNEC13T43
I am sorry but the customer went to Florida in his van for a month. When he returns we will again disassemble the front and look for something rubbing as most of you wise people said. It is probably something simple that my tech overlooked. I will let everyone...
1999 GMC Jimmy SL 4.3L blower motor VIN: 1GKDT13W9X
well the truck is fixed! Jeffery [...] hit the nail on the head with the HVAC control head. All powers & grounds were ok so we replaced the control head and all is well. Thanks again to all who took time out of there busy day to reply! IATN is a real time/l...
2000 GMC Yukon XL 1500 SLE 5.3L Temperature control VIN: 1GKFK1GT1Y
We replaced the ambient temperature sensor in the headliner (the one with the built in fan above drivers head). This appears to have corrected the problem. As for the a/c light blinking - the customer will bring this vehicle back when the weather gets warmer t...
1997 Pontiac Grand Prix SE 3.8L shift interlock system VIN: 1G2WJ52K4V
thank you guys for all your input. yes and ignition switch replacement cured the loss of power. new switch and shift assembly and the g.p. could make 200k. thanks again mike b
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