GMC Terrain: Conversions and Add-Ons
Add-On Electrical Equipment
Notice: Do not add anything electrical to the vehicle unless you check with your dealer first. Some electrical equipment can damage the vehicle and the damage would not be covered by the vehicle's warranty. Some add-on electrical equipment can keep other components from working as they should. Add-on equipment can drain the vehicle's 12&-volt battery, even if the vehicle is not operating.
The vehicle has an airbag system. Before attempting to add anything electrical to the vehicle, see Servicing the Airbag-Equipped Vehicle on page 3‑32 and Adding Equipment to the Airbag-Equipped Vehicle on page 3‑33.
See also:
Supplemental restraint system (SRS)-airbag
The information for SRS airbags includes important information concerning the
driver’s and front passenger’s airbags, the side airbags and the curtain airbags.
The SRS airbags are designed to supplement the primary protection of the driver
...
Gear Oil
Specified Gear Oil
When replacing gear oil, use gear oil with the appropriate viscosity and grade
as shown in the charts below. We highly recommend you use SAE 75W-90 gear oil (SAE
80W-90 for front differential oil, rear differential oil and tra ...

Towing