Is 16 mpg average city & highway? What are some basic tune up parts without going broke? 2001 V6 170,000 mi. Thanks to who reply.

 

Depends on if your Blazer is a 2dr, 4wd, and the rear-end ratio. However, 16 mpg overall seems reasonable. Mine (see my .sig file) at best gets 19 on highway if I'm limited to about 60-65 mph.

As for tune-up parts the basics would be:

• cap
• rotor
• spark plugs
• spark plug wires

The opinion seems to be that for at least the cap, rotor and plugs, you should use AC-Delco parts. There is some debate about the best wires to use.

Replace the air filter with a high quality one (Wix) and check the vacuum hoses for leaks. These hoses are cheap and easy to replace.

P.S. Are you planning to keep your truck? If so, consider replacing the lower intake manifold (LIM) gaskets if they have not already been replaced. They are notorious for catastrophic failures that ruin the engine. They should be replaced with an upgraded version.

 

Its pretty good for a 4wd. Slightly low for a 2WD. 4.3 Vortecs aren't known for their fuel mileage. I get 14-15 combined with my 2001 4wd. Depends on where and how you drive.

 

same here...about 14-16mpg

 

2000 jimmy SLS 2 door 4wd --- 18 highway, 16 city, 13 playing in the snow in 4wd..

 

I get up to 18-19 mpg if I'm limited to 65 mph, less if I'm 70 mph.

Around town, 12-14. Towing my boat (2,200 lb) 14 on the highway (60-65 mph max).