# Engaging 4 wheel drive on 2010 GMC 2500 HD Truck **URL:** \ **Category:** Maintenance/Repairs\ **Created:** [June 29, 2010, 11:08pm UTC](https://community.cartalk.com/t/engaging-4-wheel-drive-on-2010-gmc-2500-hd-truck/51085 "2010-06-29T23:08:10Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![lucywilliams](https://avatars.discourse-cdn.com/v4/letter/l/df705f/32.png) [@lucywilliams](https://community.cartalk.com/u/lucywilliams)\ **Post date:** [June 29, 2010, 11:08pm UTC](https://community.cartalk.com/t/engaging-4-wheel-drive-on-2010-gmc-2500-hd-truck/51085/1 "2010-06-29T23:08:10Z")
Hello Car Talk People, I’m asking this question on behalf of my boyfriend. His only interest in engagement has to do with his 4 wheel drive GMC 2500 HD Truck. He wants to know the correct procedure for 4-wheel drive engagement. What would be the max allowable speed for engagement? He only wants to know High engagement only. Can you please answer this question ASAP cuz I want to discuss other engagement issues with him. Thank you. ---
**Author:** ![waterboy](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/waterboy/32/764_2.png) [@waterboy](https://community.cartalk.com/u/waterboy)\ **Post date:** [June 29, 2010, 11:49pm UTC](https://community.cartalk.com/t/engaging-4-wheel-drive-on-2010-gmc-2500-hd-truck/51085/2 "2010-06-29T23:49:57Z")
All that information should be in the manual, look it up! ---
**Author:** ![lucywilliams](https://avatars.discourse-cdn.com/v4/letter/l/df705f/32.png) [@lucywilliams](https://community.cartalk.com/u/lucywilliams)\ **Post date:** [June 30, 2010, 12:40am UTC](https://community.cartalk.com/t/engaging-4-wheel-drive-on-2010-gmc-2500-hd-truck/51085/3 "2010-06-30T00:40:39Z")
Not helpful. If we had the manual we would have looked it up. The manual is Shanghaied at the dealership where it has been wasting away under the incompetent management of the dealership people (Allen Samual’s Chevrolet). ---
**Author:** ![waterboy](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/waterboy/32/764_2.png) [@waterboy](https://community.cartalk.com/u/waterboy)\ **Post date:** [June 30, 2010, 1:47am UTC](https://community.cartalk.com/t/engaging-4-wheel-drive-on-2010-gmc-2500-hd-truck/51085/4 "2010-06-30T01:47:22Z")
[http://www.silveradosierra.com/download/gmc/sierra/owners\_manual/2010\_gmc\_sierra\_owners.pdf](http://www.silveradosierra.com/download/gmc/sierra/owners_manual/2010_gmc_sierra_owners.pdf) I have never had to do high speed on the fly 4wd engagement, 4 lo for the trailers extremely rarely, 4 hi If WI weather or construction sites demand it at the beginning of the trip. Sorry I can’t help more. ---
**Author:** ![pleasedodgevan2](https://avatars.discourse-cdn.com/v4/letter/p/ad7895/32.png) [@pleasedodgevan2](https://community.cartalk.com/u/pleasedodgevan2)\ **Post date:** [June 30, 2010, 3:11am UTC](https://community.cartalk.com/t/engaging-4-wheel-drive-on-2010-gmc-2500-hd-truck/51085/5 "2010-06-30T03:11:49Z")
The dealer may let you read one from another truck. ---
**Author:** ![edb1961](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/edb1961/32/122_2.png) [@edb1961](https://community.cartalk.com/u/edb1961)\ **Post date:** [June 30, 2010, 4:02am UTC](https://community.cartalk.com/t/engaging-4-wheel-drive-on-2010-gmc-2500-hd-truck/51085/6 "2010-06-30T04:02:42Z")
Chevrolet has the manual online. 4wd is on page 3-36. [http://www.chevrolet.com/assets/pdf/owners/manuals/2010/2010\_chevrolet\_silverado\_owners.pdf](http://www.chevrolet.com/assets/pdf/owners/manuals/2010/2010_chevrolet_silverado_owners.pdf) Enjoy. Ed B.