Problems with 2003 Trailblazer
My buddy has a 2003 Trailblazer with 64,000 miles. has the 4.2 straight 6. he has had it about 6 months. when he first got it, he was averaging about 23 mpg on the highway. but now he is only getting 14 mpg or less. Truck runs fine. when put into nuetral, the truck coasts fine, so sticky brakes arent an issue. Clean air filter, tranny shifts smoothly and stays in correct gear. He had 18" rims with larger tires, but he put his stockers back on to try to gain some gas milage, but it didnt make a differance, also took off aftermarket intake and put stocker back on which didnt make a differance. there seems to be no problem with the motor/trans. Idles great, doesnt serge, tranny shifts great. Im thinking a sensor. MAF?
1992 Bonnie SE, freshly overhauled, 6000k HID'*, SensaTrac Struts, 32mm Tubular SSEI sway bar
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