2002 GMC Yukon Denali "xl tune" Questions

i have a 2003 yukon xl denali bad mileage only getting 11 miles a gallon hwy 134,500 miles on suv has it had a tune up,and check the air filter

My 2002 GMC Denali XL doesn't like to start on the first crank (especially in warm weather). Typically it starts on the second crank. I have cleaned the throttle body valve, MAF, replaced the battery ...

...xl doesn't start right away in the morning. I have to keep the key turned for several seconds before it starts. It only happens when I first start it for the day. The rest of the day it starts ...

i want to get a tune-up on my 2000 GMC Yukon xl 1500 4x4, what do i need to change. Spark plugs, wires, and air filter usually will maintain the vehicle.

When is it recommended to give a tune up to a 2006 GMC Envoy XL? {: ) The usual recommended tune-up interval is every thirty thousand kilometers.

...XL indicates a communication issue between the Powertrain Control Module (PCM) and the Electronic Brake Control Module (EBCM). Here are some steps to diagnose and potentially fix the problem: Check ...

...XL . Lately it sounds like a diesel , what could be wrong? Many things. Bad gas, bad plugs etc. It sounds like it just needs a tune up. Not burning fuel like it should can make it knock at a low idle ...

what is done on a 100,00 mile tune up what needs to be replaced on a 100,000 mile tune up If the car is running fine and there is no visible signs f damages. Then the only thins that need to be ...

how do I peak and tune my cb and what chanel do you set it at I have a corbra cb also have a fire stick annt. You are not allowed to open it and make any mods without the proper licence however I ...

tune up performed. ( plugs, wires, air,and fuel filter) what could I have missed? Car has 159000 miles 01 Yukon xl P0300 is multiple cylinder misfire. If your engine is a "vortec" then I would suspect