1999 Chevrolet Silverado

dave40

;ordered black SIERRA 2500 august 1st 4 build dates NOV 9th NOV 26th DEC 7th JAN 4th waited this long what the PUCK !!

ruz

This topic is getting too long, so I'm going to freeze it and start a new one.

The new topic is topic #461, Chevrolet Silverado.

cookie1

Dear Brutus, I have owned several 3.42 rear axle ratio Chevy Silverados with the 350 Automatic.
I put mostly 400 highway miles a week on my truck.
I constantly checked my mpg and it averaged everytime 15-16 mpg. I currently own a 3.73 exact
same truck and probably will not go back to a 3.42 because I actually get better gas mileage around 16-17 mpg but rarely under 16 mpg. I find that the 3.73 rear axle ratio does not make the engine kick in to a higher rpm range as often even on slight up hill climbs in overdrive. This actually helps the engine save gas and wear and tear. It also has a little bit more pick up when pulling or off the line from a stop sign. I say get the 3.73 over the 3.42 since with the heavy duty trailering equipment package, it does not cost anything to upgrade.