iATN Member GM Auto Repair Tech Exchange for January 11, 2007

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Open Help Requests for GM

	Help Request	Answers
	1994 Buick LeSabre 3.8L Unknown Hello to all. We went trough this 4t60e for slow to engage cold.Found post for known seal input problem so we resealed it and replaced the clutchs. Put it back in and no go. I can feel it engage reverse and drive but it wont pull. Wondering if anyone knows wha...	View
	1998 Cadillac Eldorado 4.6L Drive-axles Need help on this one. When you drive the vehicle and make a right turn, the car makes a tinny/ clicking noise in the front drivers side. When you make a left there is no noise. We have gone through this front and thouroughly and found nothing. We checked both...	View
	2001 Cadillac DeVille 4.6L instrument cluster Fellow techs, please help! This cadillac came in wth an intermittent stall complaint and traction light on. P0335 stored in computer. replaced both crank sensors and all is well. Customer wants vehicle check over for any other needs. We replaced both front hub...	View
	1990 Chevrolet C1500 5.7L Misfire This engine has a dead miss on #4 and #5 cylinders only at idle. Runs Great Going down the road and on acceleration. Feels just like a vacuum leak. We smoke tested and did not find an external vacuum leak. We also removed the EGR valve and checked (OK). We als...	View
	1993 Chevrolet S10 Blazer 4.3L Cuts out, Stall This one came to me after the computer had been replaced, the fuel pump relay, the fuel injector and who knows what else has been done. It will just quit at idle for no known reason. It never loses spark during any of these episodes. Fuel pressure hovers betwe...	View
	1996 Chevrolet Blazer 4.3L vent the trasmission pushes fluid out the vent even thow the fluid level is low, nothing appears to be unpluged. it shifts gears fine and drives fine untill the fluid levle gets to low. The fluid runds onto exhuast smoking like crazy.	View
	1996 Chevrolet Blazer 4.3L Poor Idle Quality, Misfire, MIL Lamp on check spark, compression and so on. found that injectors on cylinder #5 and #6 were stuck open. when remove the intake for warranty service found all the injector tubings were burn. trying to determine why injector were burn other than maybe backfiring. cust d... Trouble codes: P0304 (misfire cylinder 5), P0306.	View
	1998 Chevrolet Lumina 3.1L No Start no codes runs or barely runs at part throttle. good square wave from cam sensor. good wave from 7x crank sensor good square wave from 24x crank sensor. Map sensor sweeps fine. tps sweeps fine. 24x & 7x crank are relatively equal during cranking. Should the rp...	View
	1998 Chevrolet Corvette 5.7L Steering This corvette has a code C1281 steering sensor uncorrelated malf. has anyone seen this before is there a common fix we dont see many vettes in here so were kinda at a loss on where to begin. Is the steering sensor a common problem on these? Any input would be ...	View
	1998 Chevrolet Cavalier 2.4L No Start I did the usual checking on this thing and found low fuel pressure, 12lbs, so we ordered a pump assembly and installed it. Car will still not start. Rechecked fuel pressure, I now have 45lbs. Pulled coil assembly, I have good spark on all cylinders.Plugs are g...	View
	2001 Chevrolet Silverado 2500 HD 6.0L Poor Idle Quality truck has poor idle at start up until warms up, fuel pressure good new plugs, when off idle runs good but at idle runs rough and rich,no codes.	View
	2001 Chevrolet Tahoe 5.3L battery Customer called for emergency "jump" start. Said battery was completely dead. Retrieved vehicle after jump start. Battery was indeed dead. Test for draw. Significant draw present. The draw remained steady throughout the fuse removal process (we removed each an...	View
	2002 Chevrolet Impala 3.4L radio Radio works normal most of the time. Occasionally however the radio will display "locked" and not work. If you shut the key off and then restart sometimes it will come again normal and sometimes still stay locked. The custemer doesn't do anything other than re...	View
	2003 Chevrolet Trailblazer 4.2L battery This trailblazer has a intermittent dead battery overnite!!! I tested for parasitic draw and every time its around 30 milliamps which seems ok! The vehicle will work for months at a time then all of a sudden after driving it the day before it sits overnite and...	View
	2004 Chevrolet Express 3500 6.0L oil pressure hey guys we have a 04 chevy van with very little oil pressure we need to know what is common are the oil pumps common?is the gauge unit a problem?when you rev the engine the gauge shows 10lbs at idle shows nothing please help	View
	2005 Chevrolet Cab & Chassis Silverado 6.6L no fuel transfer Thanks in advance for your help and ideas. This problem started when both tanks were empty and the rear tank was filled first. From that point on the fuel has never transfered from the rear to front tank. Unplugged battery to reset system - no change. I don't ...	View
	2000 Pontiac Grand Prix 3.1L input speed sensor hello folks, car came into shop with a service engine soon light, and shifting harsh. pulled codes found po717 {input shaft speed sensor low input}. proceded to find a tsb for condition, bulletin #02-07-30-022a.talks about 20 pn connector problem not seating r...	View
	2001 Pontiac Bonneville 3.8L Stall This car is one of those shy ones that only acts up when nobody is looking. At idle intermittently it will die, usually restarts after a couple tries. I did catch it one time and it was idling fine then died like shut off with key. It did not want to restart, ... Trouble codes: p1626 (anti-theft fuel enable ckt).	View

Fixes & Summaries for GM

	Fix/Summary	Answers
	1997 Buick LeSabre 3.8L Hesitation, Surge, Stall, Misfire Hello all, Thank you for your replies to my question I replaced the fuel filter and checked fuel pressure which was staedy in the 40+ psi range when disconnecting vacuum to the regulator pressure jumps 10 psi.sent vehicle to transmission shop for evaluation of...	16
	2005 Buick LeSabre 3.8L Pressure control solenoid I waited a few weeks to make sure I didn't hear bad news on this one. Most replies said to just replace the solenoid, that's what I did and it appears to be a fix! Thanks for all the replies! The next time I'll take more advise and try doing the solenoid in ch...	13
	1996 Chevrolet C1500 5.0L Excessive Emissions, Poor Idle Quality, MIL Lamp on I want to thank everyone for their responses.Nearly all pointed to the fuel pressure regulator.EGR and vacuum checked out OK.Looked down throttle body,noticed fuel was puddling.Pressurized system and noticed fuel seepage in plenum.Replaced fuel pressure regula... Trouble codes: P0172, P0175, P0300.	22
	1996 Chevrolet Cavalier 2.2L No Start This one has been gone now over a week with no further problems. A theft relearn was tried to no avail initially. After unplugging air bag module it started, but when plugged in again it kept starting. I was able to push down in the center of the module, flexi... Trouble codes: P1601 (Serial Data Bus), P1629 (Theft Deterant Crank Signal).	7
	1997 Chevrolet S10 4.3L No Start, Misfire sorry for taking so long to git back to this ,since i posted thisrequest ive had the flu but got back to work today this truck is fixed turnes out that the hosees running to the poppets were leaking very bad was gitting fuel but not enough the reason for the f...	29
	2001 Chevrolet Impala 3.4L temp guage i'm closing this ty for all the help.iunderstand not that the pckm can see a temp problem and turn fans on just don't understand why one fan would stay on when eng is off on this car. still operating ok so customer declined any further repair. again ty.	6
	2001 Chevrolet Blazer 4.3L No Start well we disconnected the passkey sensor and the lady left our shop to go on a long trip. the code never came back and we never encountered the symptom again. i hope we fixed it however we aren't sure yet. thanks for all the help guys. its good to have you for ... Trouble codes: P1626 (incorrect password detected.).	13
	2002 Chevrolet Trailblazer 4.2L Mechanical Yep, flexplate cracked. Thanks for the input guys... didnt think of that till i read my first reply, IATN is a great information highway and being a one man shop, it helps a lot, well worth the dues.	12
	2004 Chevrolet Express 2500 6.0L hydro boost We were not able to veify complaint, so we could not verify the fix; however we did replace p/s pump and flushed p/s system. Customer has not returned since fix.	7
	2001 GMC Yukon Denali 6.0L Compressor First I just want to say,thank you for all of your help. The updated hose assembly part # is 15-10413, only if you have rear air. If you have no rear air there is no update to the hoses. The compressor, when ordered from the dealer is an automatic update, as i...	7
	1997 Pontiac Bonneville 3.8L level ride turns out it was a sticky ride height sensor and a fualty timer relay. thank you for all your help---did i mention i love iatn!	3
	2005 Pontiac Grand Prix 3.8L Air bag OH, the liberating feeling that comes when finally found privy to all pertinent information. Thanks to Bob from Ontario, who helped by getting us to concentrate on the wire colors. Ok, we finally asked the right questions and found out that the sensor conn...	3

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