โJul-11-2020 04:04 AM
โAug-06-2020 07:06 AM
ktosv wrote:
I am not towing a large travel trailer but I would take my 3.08 equipped grocery getter over the towing 3.42โs any day unless I was going to be towing at the limits. On a recent non towing trip on two lane roads at 60mph I was pushing 29mpg. Memorial Day weekend with eight of us and a roof top carrier I was getting over 22mpg on the highway. I never saw those numbers with my 3.42 equipped Yukon XL. The Suburban also gets 2mpg better towing than the Yukon XL did.
โAug-06-2020 03:11 AM
โAug-05-2020 05:05 PM
โAug-05-2020 05:02 PM
โAug-05-2020 10:45 AM
bazar01 wrote:
I have a 2001 Suburban 1500, 5.3L 2WD, 3.73 rear end with 280k miles.
I tow a 18 ft, 4500 lb travel trailer 30% of the time.
Still shifts very smooth.
It's all about maintenance.
Rear end gear oil change every 50k miles. Synthetic 75W/90
Transmission fluid/filter change every 50k miles. Synthethic ATF.
Oil changes every 5k miles. Mobil 1 synthetic 5%/30
โAug-05-2020 07:43 AM
โJul-11-2020 05:55 PM
โJul-11-2020 05:21 PM
โJul-11-2020 09:26 AM
โJul-11-2020 07:41 AM
โJul-11-2020 07:26 AM
eHoefler wrote:
Really not a towing vehicle, more like a grocery getter. High axle ratio will indicate a lower towing capacity.
โJul-11-2020 07:20 AM
blt2ski wrote:
Most common AR is 3.43, next 3.08, very rare a a 3.73 behind that motor. I believe grit dog is pulling upwards of 10k with his work rigs. Granted equipment trailers vs an RV trailer.
Altho someone above commented on tall axle ratio, the 6 so auto has a 4.10 in first gear. So overall low is better than my C2500 with 4.10s in axel, and a supertall 2.48 in trans.
I personally would not worry about it. I've been looking at 4 3s with 3.23 in red, or 3.42 in 4wd. Not worried about it towing a 7000 lb trailer with a mini excavator.
Marty
โJul-11-2020 07:16 AM
โJul-11-2020 05:45 AM
APT wrote:
Please recheck the axle ratio. If you are able to look at the sticker in the glove box for RPO codes, look for GU4 or GU6 which are most common.
The 5.3L has been around for over 20 years with refinements over the years. There are plenty of them with over 300k miles. GM's small blocks are some of the most reliable and cheap to maintain of any engines.