GM Automotive Technicians Technical Discussion and Fixes for May 10, 2010

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Open Help Requests for GM

	Help Request	Answers
	2002 Buick Park Avenue 3.8L horn VIN: 1G4CW54K32 The problem is that the horn will intermittently blow on it's own;just a quick 1/2 second(approximate)burst. Usually happens while driving,but is very intermittent;maybe happens once every few months. Haven't tested anything because I'm not sure where to start...	View
	2005 Buick Rendezvous CX 3.4L No Start VIN: 1J4GW48S74 This vehicle has an intermittent no start condition. It started about 1 month ago. This is owned by an older woman. She stopped to fill up on fuel locally after driving about 10 minutes. After filling up she could not get vehicle to start. Cranked over and did...	View
	1969 Chevrolet Corvette 5.7L amp gauge VIN: 19469S7133 Hi guys, After repairing a draw, I find that the car is charging as high as 15 volts. Does not charge any higher when on the gas. The customers complaint is that when he steps on the gas, the ammeter does not climb like it used to. I think if I replace the ...	View
	1987 Chevrolet S10 2.8L Excessive Emissions VIN: 1GCCS14R3H The EGR Passes are plugged . I remove The EGR valve and the TBI , and I tried to clean the paasse using the drill and the elastic tool ,but no luck . Any idea if I have to remove the intake to clean the passes , anyone faced this case.	View
	1995 Chevrolet C1500 5.7L 3-4 shift VIN: 1GTEK14R4T I am working on an older car with a 95 5.7 throttle body and 4L60E suppsidly out of a 95 two wheel drive suburban. Runs fine and shifts like it is supposed to until you put it in overdrive, it stays in second gear. All other gears work like they are supposed t...	View
	1997 Chevrolet K1500 Suburban LS 5.7L No Start VIN: 1GNFK16R0V Vehicle came in with code 340 cam shaft position sensor. Replaced same. When I went to start the engine it sounded as if it was 180 out of time backfiring through Throttle Body. Checked with Solis pro no additional codes rechecked all connections. Un pluged cr... Trouble codes: P0340	View
	1998 Chevrolet K2500 Silverado 5.7L Hesitation, Stall VIN: 1GCGK24R7W vehicle towed to shop with complaint of stalled while driving @ 60mph. customer stated vehicle would not restart. upon arrival at shop vehicle started and would idle fine. the problem is that it will not accelerate unless you feather the foot pedal.if you can ...	View
	2000 Chevrolet S10 4.3L 1-2 Shift VIN: 1GCDT19W6Y This truck is exhibiting a no shift/slip when shifting from 1 to 2. Also, the truck has no fourth gear. The transmission will shift when the throttle is lifted; but it is a very poor and loose shift. After the shift is complete the gear holds with no slip. The...	View
	2001 Chevrolet Silverado 2500 HD 8.1L Hesitation VIN: 1GCHC23G01 Hello iatn universe and thank you for the help in advance. This problem child has me stumped. Fuel system is virtually brand new. New delco pump, regulator and fuel filter. All injectors ohm at spec ( 11-14 ohms ). Maf is good and so is map. This truck under a... Trouble codes: P0300	View
	2001 Chevrolet Impala 3.4L No Start VIN: 5678909876 Vehicle will not start, Have fuel and spark 55 psi. On PID for BODY CONTROL COMPUTER Passlock sensor voltage is at 0.00 volts, sometimes going to 2.35 volts but still no start. Passlock reference voltage reads YES. PCM PID shows VTD/PCM FAIL ENABLE, and it s...	View
	2003 Chevrolet S10 2.2L No Start VIN: 1GCCS14HX3 Hi, this came in died on road, no spark and no injector pulse, shows no crank or cam rpm on scanner. had code p0336 crank sensor signal, I replaced crank sensor, replaced ignition control module, installed new ECM that was flashed and passlock was relearned, T... Trouble codes: P0336	View
	2004 Chevrolet SSR 5.3L Door Locks,Windows, Roof Top, And Lower Gauges VIN: 1GCES14P74 I have a 2004 ssr 5.3. Customer came in with complaint of door locks,roof top,and windows dont work. Checked with tech2 and found that no responce with roof top module. Replaced roof top module and roof started working but noticed that the radio was making a p...	View
	1996 GMC G3500 Vandura 5.7L Misfire VIN: 1GTGG35K6T At part throttle (light cruise) around 20 MPH or so there is a misfire and slight popping in the exhaust. If you give more throttle the problem goes away immediately and the engine has lots of power. Idle is also perfect. Please note this is a TBI engine as u...	View
	1996 Oldsmobile Cutlass Ciera 3.1L MIL Lamp on VIN: 1G3AJ55M7T Thanks in advance for any help with this car. Have scoured the archives and can't seem to find a similar situation. The thing that is puzzling me is the readings on my 2 different scanners for the MAP voltage. Is this normal or is the computer equating the lo... Trouble codes: P0401	View
	2000 Pontiac Firebird Trans Am 5.7L Spark Plugs VIN: 2G2FV22G6Y In process of maintenance tune work, no running probs just passenger side access to spark plugs, d/s is easy, but have looked from underneath on p/s, thru wheel well, from above, looks like rain tray has got to be removed and then remove receiver drier or from...	View
	2003 Pontiac Grand Am SE 3.4L Cuts out, Stall VIN: 1G2NF52E8C Hello there. This vehicle came in for cutting out and stalling. Fuel pressure is at spec, even when it stalls. I did a fuel injection service and blew out the fuel filter, along with cleaning the mass airflow sensor. I have already checked the crank sensor and...	View
	2006 Pontiac Montana SV6 3.5L All Wheel Drive System VIN: 1GMDX33L46 All wheel drive disabled message on always, checked harness to rear axle, passes flow chart for code from gm, has had axle solenoid valve in rear end replaced. When looking at transmission data for awd it shows awd whl spd disable as yes and abs disable as yes...	View
	2002 Saturn L100 2.2L Key VIN: 1G8JS54F52 This Saturns ignition key will turn off and come out of the tumbler in any gear and the description of the lock mechanism is vague at best in my info system. Any help would be appreciated.	View
	2002 Saturn LW300 3.0L Tcc VIN: 1G8JW84RX2 2002 Saturn LW300 with 28,000 miles. Reported to be a flood vehicle, though I can see no evidence of damage. Fluid level verified. Transmission shifts fine through all gears, but TCC kicks in and out. You can watch the slip go positive and negative when this o...	View

Fixes & Summaries for GM

	Fix/Summary	Answers
	2000 Chevrolet Express 1500 5.0L Misfire, MIL Lamp on VIN: 1G2Y222788 intake gaskets fixed this van as most stated. found gasket sagging sucking air from crankcase. Trouble codes: 300 (misfire also has high idle code cant remember code).	22
	2002 Chevrolet Silverado 2500 HD 6.6L Excessive Emissions, Misfire VIN: 1GCHK23162 mronin fellow techs.we got rid of this one on friday.i didnt get into much more diag.on it,but my suspitions were #s5&6 injectors bad.looks like we need to get a tech2 scan tool.anyway,cust.went for all8 injectors.i called the dealer who was good enough to put...	14
	2002 Chevrolet Corvette 5.7L Mechanical VIN: 1G1YY22G32 Thanks to all for your help and especially those who said check starter drive it would come out from momentom when accelerating and hitting flywheel. Replaced starter and noise is gone.	10
	2006 Chevrolet Uplander LS 3.5L Alarm system VIN: 1GNDV23L76 Well off the bat we found out that this van was NOT equipped with an alarm system. So all along it had to be something in the panic system. We never did get this to act up, so we did the "trial" method 1st. We disconnected the remote keyless entry module going...	3
	1996 GMC Sonoma SLE 4.3L Mechanical VIN: 1GTCT19X4T Well, As Most Of You Said, And I Guess I Figured The Same But Was Hoping For An Easier Repair, One Of Those Damn Little Torx Head Screws From The Dist. Cap Found It's Way To The Piston. Not From Me Though. I Still Had The 2 Screws To This Cap. It Broke Apart A...	28
	2006 Pontiac G6 3.5L MIL Lamp on VIN: 1G2ZF55B86 We called the gm dealer the 1st time & they didnt of course know anything. But after Mike from Wisconsin told me of the gm tsb we called the gm dealer back with the tsb # & they of course had it. We sent it to get the pcm reprogrammed & sent the customer on th... Trouble codes: P0128 (Tstat temp low).	11

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