GMC 1994 Yukon Owner's Manual page 355

21.
22.
23.
24.
THERMOSTATICALLY CONTROLLED ENGINE COOLING
FAN INSPECTIONAV
-
(If so equipped.) Inspect all hoses and
ducts for proper hook-up. Be sure the valve works properly.
Check that the valve works properly. Correct any binding. Inspect
hoses for cracks, chafing or decay. Replace parts as needed.
TIRE AND WHEEL ROTATION AND INSPECTION
-
For proper
wear and maximum tire life, rotate tires at the first 6,000 rniles (10 000
kilometers) for Schedule I
(+)
or 7,500 miles (12 500 kilometers) for
Schedule I1
(e)
and then every 15,000 miles (25 000 kilometers)
thereafter. Follow the instructions and patterns shown in Section 6.
Check tires for uneven wear or damage. If irregular or premature wear is
apparent, check wheel alignment. Also, check or damaged wheels. See
"Tires" in the Index for more information.
For dual wheels, whenever the vehicle, wheels, or fasteners are new,
have the wheel fastener torque set at the first 100, 1,000 and 6,000 miles
(
160, 1600 and 10 000 km).
Block the tires opposite those being removed to keep the vehicle from
rolling.
DRIVE AXLE SERVICE?
-
Chec.k readfront axle fluid level and
add as needed. Check constant velocity joints and axle seals for
leaking.
EXHAUST PRESSURE REGULATOR VALVE INSPECTION*
-
0
0
0
Locking differential - Drain fluid at first oil change and refill.
Check fluid level and add as needed at subsequent oil changes. In
dusty areas, or trailer towing applications drain fluid at every
15,000 miles (24 135 kilometers) and re.fiII.
Standard differential
-
Check fluid level and add as needed at
every oil change. In dusty areas, or trailer towing applications,
drain fluid every 15,000 miles (24 135 kilometers) and refill.
More frequent lubrication may be required on heavy-duty or
off-road use.
*
An Emission Control Service
ANoise Emission Control Service
VApplicable only to vehicles sold in the United States
?A fluid loss in these systems may indicate a problem. Have them
inspected and repaired at once.
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