20 Most Recent 2006 GMC Yukon SLE Questions & Answers

Remove the rear wiper relay. The relay works just like a fuel pump relay or any other relay. Here is example of your relay system and how to test it: Remove the relay and turn the ignition switch on and the rear wiper should not operate. If the motor works with the relay out then seek out a priest as the motor is haunted. To test the circuit do the following: Bypass the relay with a piece of wire, (preferably fused). This means: Remove the relay and put the piece of wire in place of terminal 30 and 87 in the cavity where the relay lives. Even if you don't use a fuse all you are doing is giving the wiper motor the same voltage it would be getting if the relay was closed. All electrical diagnoses should come from the relay. It gives you the input and output for the accessory. The input is 12v hot on terminal 30. This usually this is constant hot wire from the main buss line on the fuse box. The 87 terminal goes to the fan itself so that the output of this terminal will be a grounded motor waiting for voltage. The 86 wire on this relay is normally fed through the fuse box via the appropriate fuse and gets voltage when the ignition is turned on. The 85 terminal on the relay is the field ground and energizes the relay. This wire comes from the switch. When the rear wiper switch is turned on it sends ground the relay terminal 85 which closes the points of the relay and allow power to travel from the 30 terminal to the 87 terminal. This gives power from the 30 terminal to the appliance at the other end of the 87 terminal. The grounded rear window motor receives this power, begins to spin and operate the wiper. By the way relays have a failure rate of about .015% so the problem probably isn't the relay itself.Joe

For every AC unit there should be a thermostat which is responsible for detecting heat temperature. The thermostat might be faulty or there might be a gas leak somewhere along the line. It's a common problem in AC units...

Diagnostic trouble code (DTC) P0601 stands for "Internal Control Module Memory Checksum Error." It is triggered when the powertrain control module (PCM) detects an internal problem, typically a failed Memory checksum test. The PCM's memory checksum test is performed regularly.Oct 27, 2023

P0601 Code: Internal Control Module Memory Checksum Error

CarParts.com https://www.carparts.com > ... > OBD-II Trouble Codes ..

The black wire with white lettering running from the lug on your alternator to your battery cable should be your fusible link and it will say on it.

Remove the speed sensor and look in the hole, are there teeth in there and do they move with the vehicle, this really sounds like a speed sensor problem so if all appears good including checking the wires with a continuity tester get a new sensor.

Recheck wiring not installed correctly

If you are getting a check engine or dash light check for codes Really I think it could be fuel, air or back pressure. It is a good thing to have codes sometimes. Below a few thing which my help http://www.autotap.com/problem4_engine_hesitates.asp https://www.youtube.com/watch?v=bDCaAZedVYY https://www.yourmechanic.com/estimates/gmc/yukon-xl-1500/engine-hesitates-during-acceleration-inspection https://www.youtube.com/watch?v=cXHfJTbcSgY https://www.youtube.com/watch?v=-SRgNXKoOC8 https://www.gm-trucks.com/forums/topic/200207-yukon-xl-denail-2009-severe-hesitation-and-poor-gas-milage-real-head/

Driver's side under the car, along the frame.

Fill neck on the tank collapsed?

How do you know they need to be replaced ? The switches incorporate a electronic module . Driver door module . Power Window System Components The power window system consists of the following components: • Driver Door Module (DDM) • Passenger Door Module (PDM) • Body Control Module (BCM) • RR power window switch • Window up and window down relays in each of the rear passenger window switches • Window lockout switch • Reversible power window motors in each of the doors (circuit breaker protected) • LT DOOR CB 25A (System power for left windows) • RT DOOR CB 25A (System power for right windows) Power Window System Controls The power window system will operate anytime the Retained Accessory Power (RAP) system is active or when the ignition switch is in the ACCY or ON position. The DDM contains four power window switches which are integral components. Closing any of the normally open, rocker type switches provides the DDM with a request for power window operation. The switches for the two front windows have three positions UP, Down and Express Down, while the switches for the rear windows have only two positions, UP and Down. Each of these switches and their positions is a direct input into the DDM. Upon receiving a request for power window operation, the DDM, transmits a Class 2 message indicating the switch and it's changed position. The PDM contains a single power window switch that is an integral component. Closing of this normally open, rocker switch provides the PDM with a request for the front passenger power window operation. The switch for the front passenger window has two positions Up and Down. Each of these switch positions is a direct input to the PDM. The two rear passenger doors have there own switches. Each of the switches contain a power window up and down relay. A switch activation alone can control the up and down functions of the rear windows. However the BCM, upon receiving a Class 2 message from the DDM, can control the set of relays which will activate the rear window motors. The door locks operate the same way . Door Lock System Components The power door lock system consists of the following components: • The driver door module (DDM) • The passenger door module (PDM) • The body control module (BCM) • The driver information center (DIC) • The rear door lock switch • The door lock relay • The door unlock relay • The liftgate lock relay--utility vehicles with liftgate only • The reversible door lock actuators in each of the doors and liftgate • LOCKS 20A fuse (rear lock/unlock relay supply voltage) • ECC 10A fuse (liftgate lock relay supply voltage) What's not working ? Windows , power locks ? Hooking up a professional type scan tool ,not a code reader . Code reader can not read codes in the BCM or door modules . Do you know what a DTC is ? diagnostic trouble code >All these can set for door electronic problems . DTC B1023 DTC B1544, B1600, or B1605 DTC B1580, B1590, B1610, or B1620 DTC B1640 or B1645 DTC B1722 DTC B3808 DTC B3809 DTC B3819 DTC B3820 DTC B3821 DTC B3822 DTC B3823 DTC B3824

Check light bulbs. They can be taken out with the holder from behind the bumper. They are ion the same fuse as the running lights so if they work, the fuse will be good.

Is the dash light dimmer control turned all the way to off?

No such code's for your vehicle , cheap code reader ,.Take it to a qualified repair shop that has a professional scan tool . These are the correct code's for OBD2 https://www.engine-light-help.com/gmc-check-engine-light.html

Instrument Panel Fuse Block (Right) The right instrument panel fuse block access door is on the passenger side edge of the instrument panel. Fuse 21 - Sunroof Fuse 29 - Radio See pg 294/5 https://my.gmc.com/content/dam/gmownercenter/gmna/dynamic/manuals/2016/GMC/Yukon/2k16yukonden1stPrint.pdf Not sure where the DVD player gets power if not w/ sunroof.

Sounds like you need to replace all the spark plugs and dont foget to properly set the gap of the plug. Dont over tighten the spark plug. About a 1/4turn after contacting the head should be good for proper torque.It might even pay off to have a compression test done when the spark plugs are out.
Do these things before going further on your repair. Please let me know how things work out.

Check with a good mechanic.

The clutch in the torque converter could be slipping causing excessive heat. What is the transmission fluid temp?

in school we had one like that it was the throtle position sensor

hello u will find a lot of wiring diagrams and circuit diagrams help books and stuff like this at reliable-store the girl in the chat box can help u instantly... im a frequent buyer there since Im a mechanic so take help from there