2003 yukon Denali tires 255/70/ r17 should be 265/70/r17 is it ok to use them they are new

SOURCE: 2003 Denali Yukon, no Brake lights, no Cruise Control, fuse is OK

Check your brake light switch at the pedal. This controls the lights and disengages the cruise when stopping. I'd look there before I go anywhere else. There may just be a wire loose. Could be a simple fix.

Good Luck and hope this helps.

SOURCE: 2003 yukon denali---relay locate for blower

the relay is built into the speed resistor or motor control module ) depends if you have automative or manual heater controls. is automatic it will be motor control module and manual is the resistor module. these units are located beside the heate fan motor. the motor helps keeps the unit cool. just unbolt the module, unplug it and install new one. Just check to make sure the connector is good.. The heat created by the connection sometimes melts the power or ground leads (red or black) and if this is so you will need to replace the pin.

SOURCE: locting the throttle position sensor on a 2003 gmc

The throttle position sensor is located on the throttle body. Which is in the front of the intake manifold.

SOURCE: where is the coolant temperature sensor located in a 2003 yukon

It is best to allow the engine to cool down for about 3-hours before starting this job. This is for safety and convenient reasons. It also helps to minimize the loss of coolant. Coolant draining into the environment should be avoided.
After the engine cools down, disconnect the negative terminal of the battery.

Location: The Denali's engine coolant temperature-sensor is located (threaded) into the cylinder-head just above the spark-plug. It is good thing to remove the spark plug wire in the coolant temperature-senor's immediate area. This will allow more room to work it out.

It is removed by first undoing its electrical plug, and then using a deep socket with wrench to loosen the coolant temperature-sensor.
Once done, verify that the electrical connector is replaced in its proper location. Then coonect back the negative battery terminal.

Testimonial: "Thanks!"

SOURCE: How do I remove and replace the power side mirror

2003 GMC Yukon - My power mirrors stopped working.... all fuses have been checked and they are all good. Any ideas? These are the power folding mirrors. The function that allows you to fold them in for car washes etc still works.... they just will not adjust when you change drivers, or when you try to adjust them with the controls. Any ideas would be appreciated!