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I've got an 05 Suburban 1500 with the 5.3L we bought with 130K miles and now has 206K miles. Since 130K I've changed the oil with Mobil 1 High Mileage 5w30 and and Mobil 1 oil filter every 5K. We recently did an oil change with a local shop that used standard bulk 5w30 (not sure what brand)...

First time to own a diesel, anything different I should be concerned with as far as oil? 6.7L Cummins and 300 miles on it, the manual says oil change intervals of 15K which seems long for regular oil. Also, states 5w40 or 15w40 which I planned to run 5w40 synthetic Rotella if that's a good...

My Silverado had 190K on it and for the last 100K I've been doing OCI of anywhere from 3-5K (never over 5K) with Mobil 1 5w30 and a Mobil 1 filter. The truck sees a lot of highway miles at 80+ mph here on the OK turnpikes. Having been researching oils for our new Sonata I started wondering if...

I bought a Generac GP5500 generator last fall to use for hunting season. We put just shy of 400 hours on it and I'm about to drain and change the oil so we can use it this summer with the travel trailer. It's splash lubrication and the owners manual calls for 10w30 or SAE 30. I was going to put...

Need a little advise... Just bought the wife a new car since she's going to be driving about 50 miles one way to work starting next month. Couldn't justify doing that in the Tahoe. Anyway I'm looking for a little help on oil recommendations. I plan on using synthetic and I'm looking for...

I need a little help from the experts. I have an 06 Silverado CC 5.3L 4x4 that I have decided to keep and use primarily as an offroad vehicle and hunting truck. I will be replacing the stock 265/70/17 tires for 35x12.50 tires so I want to regear both the front and rear so the trans doesn't hate...

I know I've seen it somewhere and I didn't find it searching, but other than trial and error is there a mathematical formula for figuring tire pressure? I just bought new tires but bought a bigger tire than OEM. Went from 265/70/17 to 285/70/17 on my Chevy Silverado. The original tires wore...

My sister needs to buy new tires and called me asking for opinions. Of course I checked out tirerack.com but besides the two dedicated snow tires there were only two choices to look at in the 195/60/16. Do you guys know of any other tires in this size besides the Bridgestone Turanza EL-400 or...

Well this morning I heard a low squeal while driving and it turns out my wheel bearing is going out. Problem is I have to buy the entire hub assembly. GM wants $550 for the OEM part so I plan on going aftermarket. The problem is I don't know anything about the brands. Anyone know what quality...

Okay, so unfortunately I was raised believing the Trans fluid change myth that if you haven't changed the fluid and you're past 100K then you are better off not changing it. I know I know you don't even have to say it, should have changed it earlier. I'm new to the forum and have already...

Okay simple question probably. I have the G80 rear end in my Chevy Silverado and Tahoe. I need to change the gear oil and I've read numerous GM bulletins saying not to add the friction modifer because the G80 in my truck is a locker not a limited slip like the G80 in cars. Apparently there is...

Okay, so several of you have seen my thread about the Tahoe MPG with 20's and 17's. I'll still test out the MPG difference between wheels but I'm pretty positive the 17's are going on which means I'll need new tires. 265/70/17 This is the size tire I'm looking for. I may have overestimated my...

I bought the wife a used 2006 Tahoe with stock 20" chrome wheels and 275/55/20 Bridgestone Duelers. After the first tank of gas and only averaging 14 mpg with pure gas (no 10% ethanol) I thought something was wrong so I got a wild hair and figured it must be the 20" tires/wheels bringing my...