Top 20 2005 GMC Envoy Questions & Answers

DTC P0740 Torque Converter Clutch (TCC) Enable Solenoid Control Circuit Circuit Description The torque converter clutch (TCC) solenoid valve is an electrical device that is used with the torque converter clutch pulse width modulation (TCC PWM) solenoid valve in order to control TCC apply and release. The TCC solenoid valve attaches to the transmission case assembly extending into the pump cover. The TCC solenoid valve receives ignition voltage through the ignition 0 voltage circuit. The powertrain control module (PCM) controls the solenoid by providing the ground path on the TCC solenoid valve control circuit. The PCM monitors the throttle position sensor voltage, the vehicle speed, and other inputs in order to determine when to energize the TCC solenoid valve. When the PCM detects a continuous open, short to ground or short to power in the TCC solenoid valve circuit, then DTC P0740 sets. DTC P0740 is a type B DTC. Check it out on youtube.

Probably too much unregulated power from the jump box. Get your digital multimeter and test the voltage off car and jump it to the multimeter. I live in the Great White North (Canada) and a trickle charger and a block heater are essential. I just had my block heater on for 4 days as the temperature was -15'C or - 23' with wind chill. They are only 125 watts.

scan the ECT if it reads wrong most time the 17 year old thermostat is bad. stuck open, missing or those crazy fail safe stat gone wild. ect 180 to 200f is normal . if not thermostat is first. I used and IR gun to measure the stat hosing to see if its bad, 1minutes work, most times the gauge never fails so we do 1simple test to prove that. scan the PCM is first. never seen a STaT good 17 year old, had one that told near all day to hit 180f>? when old that do nasty things, even stick closed and warp HEADS why risk that, attack the stat.

Crankshaft is unlikely. Could be water pump, probably the alternator is misalligned.

battery has a full charge and battery connections all good? There is no fuel shut-off. engine cranking, you have spark at the plugs and fuel injector pulse? At the fuel pump, gray wire is voltage, black wire is ground. Engine cranking, if you have good voltage and ground at the fuel pump but no fuel pump action, suspect the fuel pump.

get under it and look at the exhaust pipes

Do NOT use it on road you will brake something Is it switches or leavers for your controls

Hi Dave, if it's leaking from the VVT, upper left, next to power steering pump, replace it. Not uncommon for it to leak there, and would NOT be due to your oil change.

Have u located the fuse as well as the relay? Bad switch?

you need to have engine checked and possibly rebuilt or replaced, this not a quick easy fix.

Pull the rear hatch and test the motor, they have a fairly high failure rated.

ecc fuse ???? spell it out

not sure if this is what you're looking for but hope it helps.. Important: The driver information center (DIC) will display the message See Manual - Tailgate anytime a learn is required except after the installation of a new regulator. When a module is not learned, or in a window fault state, only the window remains functional. 1.Activate the window up switch using the key cylinder or overhead console switch and maintain switch activation for 2 seconds after the window has stalled in the fully closed position. WARNING Important: The window may be in any position to start the re-learn, but the up operation must be performed first. 2.Activate the window down switch and maintain switch activation for 2 seconds after the window has stalled in the fully open position.

https://www.youtube.com/watch?v=uk0NjkhK0VE

I suggest you get one of those manuals people get nowadays to do it yourself.. My brother use it to repair my car and it's totally repaired now. he got it from. www.reliable-store.com

What ????? i try to sterted manuely and it start but turn off the light stays on with the ignition. What light stays on ???? i try to sterted manuely ???? I try to start it manually !!!!!!! You need to take your vehicle to a qualified professional technicia .

It could be the relay, but that is unlikely. It is easy to check by swapping the relay with another relay in the box. For example, I swap with the horn relay.

The shift interlock isn't working. There is a manual override. Read your owner's manual to find out how to operate the manual override so you can at least get to work. Then get it to a shop to get the interlock and gauge repaired.

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