Originally Posted by mrpep
Looks like I have a 3.42 . I read so many pros and cons online that I'm not sure what is best. Some say that lightweight like my 5000 lb trailer is ok with my v8 5.7L 3.42 and some say that the 3.73 or 4.10 is better and that the 3.42 will break down faster in hilly areas. Then you have those that say that 3.73 and 4.10 are bad on gas and on daily driving especially highway. Do you guys think I'm ok with 3.42 pulling about 5000 lbs ? Would you recommend hills?
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It would help a lot to know......
make, model, year, engine
Here is the rear axle rpo codes (found in glove box) if its a gm vehicle