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Has anyone measured the cetane number on the fuel they been getting, GM recamends cetane number of 44, I cant seem to find anything over 40, then I played with the sample fuels I have and added Archoil, Amsoil, Hotshot, and added 1oz of the Archoil, 1oz of the hot shot 3 oz of the amsoil to 2...

Looking for sugestions and of mounting ideas and or fast access safes or box for a ccw/handgun in the truck

Hello, Is there a way to open the tailgate with a dead battery? Not mine but as jumping someone else's with a jumper pack I keep in a swing box with a BAK hard top bed cover, was wondering if I had a dead battery could I gain access to the jumper pack? Maybe find a place inside the truck for it...

Any suggestions or recommendations for a quality tonneau cover, security, weather, longevity, also look for a way to mount the kayak on top or with a bed rail bar and a hitch mount carrier.

Was buying DEF, The Walmart I went to was out of stock-NONE. Went to Home Depot they had it, Blue DEF-$15, and also Platinum DEF- $21, Is there a difference in Def Fluids? Worth the $ difference? Also, this is 2nd time Walmart sold out, is DEF fluid becoming a shortage item like everything else?

I have owned my 2021 since July 4th weekend, I currently have 13,000 miles. I have had the no Start reflash performed and have done oil changes and fuel filter changes. I have used 5.5 gals of Def fluid, as my daily trips average 16/20 miles 5 days a week, the weekend is when I put higher miles...

Ok Just wondering IF and which one FUEL ADDITIVE ? Scientific or opinions, has anyone checked the Cetane number to see if 4oz in 20 gals can raise Cetane 5#s? etc?

The truck slides out vibrates to other lanes on a corner in the back only, normal? Helps with 250lbs back of the bed. I know my 2006 handled the corners way better than this truck, that truck had Bilstein on back from the factory. 2021 RST,4x4, crew,3.0L, factory tires-275/60/R20, sits now...

Just sent out an oil sample 9,000 miles on the truck, (GM Dexos D 0w-20), Factory oil and filter 1000miles, at 4000miles Dexos D and an AC DELCO UPF66R Gold filter, at 9000miles took a sample and here are results. Gonna wait for 5,000 miles more and send a sample in again, now running Amsoil and...

Just ordered 2 oil analysis sample kits. Been running DexosD GM oil 0W-20, gonna send a sample at the end of this week when I change it, should have approx 10,000 miles will be my 3rd oil change is a bit premature for sure but the first one I did at 1000 miles. So I will take a sample and send...

Just installed a Boost Auto wireless phone charger on top of the center console lid, My RST did not come with wireless charging and the location of the GM factory wireless charger is not in a good spot for me. So Boos Auto had them on special and it was an easy install that works well, but the...

Been looking at the top spacers on top of the strut and the lower mount spacers, anyone has any experience with either? for the front. For the 2" leveling kit that adds a spacer bottom or top of the strut, any anyone has any experience as far as one being better than the other? Top spacer vs...

So many brands and many look good, what your opinion of the best mats/liners for a crew cab truck

Oil pressure as per the dash gauge idle hot in gear 25psi? Normal? The gauge has 60 at halfway, its normal to below less than a quarter as per the gauge?

Anyone use the ACDelco Specialty - Ultraguard Gold Engine Oil Filter Part No. UPF66R, instead of the standard PF66 filter? Was told it's the heavy-duty version of the PF66 and was told its a better choice? The following from the manufacture on the catalog page. An ACDelco Gold (Specialty)...

I now have 1200 miles on my 3.0, how soon and when can I expect approx a regeneration of the DPF. est?

Think I would like the look or the RED caliper covers on my RST, but do they really help with brake dust on the rims? Covers appear to only cover the front side, I find it hard to believe that it deflects the dust much? The other thing is $249 for small clips and tin, aluminum, stainless covers...

Owner's manual says there is a fuel funnel in the truck cant find it? Does anyone know the location?

Just picked up my new RST 3.0, had a deposit on a 5.3 RST, road-tested a diesel at another dealership, not the color I wanted, but after the road-test, I wanted the diesel! wow is all I could say, I thought the 5.3 ran good but the 3.0 is way better and fuel milage looks great? So went back to...