GMC 2003 Envoy - Manual (Page 279)

Dinghy Towing
When towing your vehicle, turn ignition off.
To prevent yqur baHery from draining while towing,
remove the Igrhition A and the Igniiion B luaes Irom
the engine compartment fuse block. Be sure to reinstall
Ihe fuse when you reach your dBetmahon^
Two-Wheel-Drive Vehicles
Two-wheel-dnve vehicles should nol be towed wiiti all
tour wheats on the ground, Two-wheel-dnve
transmissions have no provisions for inlemal luhncation
while being towed. To properly tow these vehicles,
they ahould be placed on a plattonn trailer.
In rare cases when it's unavoidable that a
two-wheel-drive vehicle is to be towed wilh all four
wheels on the ground, the propeller shalt to axle yoke
□rientatron should be marked and the propeller shaft
removed following tho applicable service manual
removal/installation procedure.
Dust or did can enter the back oi the transmission
Ihrough the opening created by removing Ihe propeller
shaft it proper protoction is not prcivided. Also, check
the iransmlssion Fluid level before driving itie fnick.
Use the toilowing procedure to low your vehicles
1. Rrni>ly set the parking brake,
2 Shift the transmission to PARK (P).
3, Securely attach the vehicle beinti towed to the tow
vehicle.
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