Another how much can I tow

bikendan wrote:
Does the car have the factory tow package?
This includes type III/IV receiver, wiring for brake controller, trans cooler, 7-pin connector and towing rear end ratio.

The standard 4,000 lb hitch on the GMT360's are rated class III. Rated to carry 400 lbs of hitch weight without weight distribution. Based on the options of the TV (4x4 vs 2x4, short vs long wheelbase, I6 vs V8, rear end ratio), those ratings go up 7,000 lbs/700lbs). Personally, I think 7,000 pounds is a bit overrated for the size of this mid-size platform. The 7pin connector was standard on all these trucks.

There was not factory brake controller harness built into these trucks. But there are 4 wires underneath the dash that are easily accessible for someone to splice into to install your standard proportional controller. (Don't by a time activated controller). You'll also have to find the red wire near the battery box under the hood and connect it to the positive battery post.

As far as rear end gear ratio, there were 3 for all production years: 3.46, 3.73, and 4.10. Check your RPO code sticker in the glovebox: GU6: 3.42; GT4 3.73; GT5:4.10. Shorter gears (larger numbers) are best for the drivetrain to trailer. If you're lucky, you'll have a 3.73. Most 4.10's were in the sport SS line of the Trailblazer and Saab's for the benefit of track speed.

Again, GM engineering incorporated the stock radiator with the transmission lines in order to provide cooling. Poor design as any automotive enthusiast will tell you. There was never a factory option of an auxiliary trans fluid cooler. Anyone serious about trailering with their Envoy/TB/Rainier will add one before they hitch up.

Simply put, if you're pulling less than 5,000lbs, the truck will still be your friend. Over that? Your BFF will be upset and you may get slapped in the face.;)