APT wrote:
The extendable towing mirrors are part of the Max Trailering Package, available on Sierra SLT and Silverado LTZ. It is not available with the Denali 1500. Since you are looking at higher trim/equipment vehicles, I highly recommend that Max Trailering Package as it increases GVWR/payload also.
There are aftermarket towing mirrors available for about $200.
I cannot comment on these specific mirrors, but many ebay mirrors are reported to be of lesser quality and can wobble at highway speeds.
From the dealer. OEM mirrors are about $600-700. Plus you will need an extra wiring harness for around $150-200.
