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yes
When new they got about 20MPG I (this info is from an 84 suburban half ton 2WD, a 93 half ton 2WD ,83 blazer and an 84 half ton pickup 2WD.
No.
Go on google Images
For the wheel... The bolt pattern for a 2001 Blazer is 5 x 4.75" (US standard). This is for the 4WD model, the 2WD may differ.
The flashers are located on the top of the steering wheel like they would be in a 2005 Chevy trail blazer.
Yes it will.
on a 91 blazer s10 4wd
When stopped or < 3 MPH push the 4WD button again and the gree light should go off and put you in 2WD.
A fair number of parts will be compatible. Some will not be - for example, if you want to put a 98+ front end on a 94 - 97 Blazer, you'll need the core support from a 98+ Blazer, Jimmy, Bravada, S10, or S15. If you have sealed beam headlights (most commonly seen on 2WD 94 - 97 models), you'll need the wiring harnesses for the lights, as well.
Listed on the driver's door post unless it has been removed. The OEM size is 225/75-15 for a 2wd Blazer. Go to the link to find the size for other Blazers of that year.http://www.tirerack.com/
YES IT CAN BE DONE BUT YOU HAVE TO HAVE A ETHER A 4WD BLAZER OR S10 THE FRAME IS 2 PEICES WELDED TO GATHER THERE ARE 2 DIFFIRNT FRONT FRAME HALFS 4WD AND 2WD JUST SAPARATE THE TO HALFS AND PUT THE 4WD HALF ON YOUR FRAME AND THEN SWITCH THE REAR END FROM THE 4WD TO THE 2WD AND YOU HAVE A 4WD