Gmc Engine And Engine Cooling:engine Questions
Gmc Engine And Engine Cooling:engine
Fri, 01 Apr 2011
1998 GMC Sierra 4x4. 118,000 miles but rebuilt engine installed ...
1998 GMC Sierra 4x4. 118,000 miles but rebuilt engine installed at 78,000 miles. Drive carefully, slow take offs, 65 to 70 mph on road, but gas mileage is 10 to 11.5 mpg. Changed air filter but no better. Tire pressure is fine. Any suggestions for better gas mileage?
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