Page 400 of 452

Long Trip/Highway Maintenance Schedule -- Gasoline Engines I
22,500 Miles (37 500 km)
0 Change engine oil and filter (or every 12 months, whichever occurs first).
0 Lubricate chassis components (or every 12 months, whichever occurs first).
0 Check readfront axle fluid level and add fluid as needed. Check constant
(3 Rotate tires. See “Tire Inspection and Rotation” in the Index for proper
MILEAGE An Emission Control Service.
(See footnote #.)
velocity joints and axle seals for leaking. (See footnote **.)
rotation pattern and additional information. (See footnote +.)
30,000 Miles (50 000 km)
0 Change engine oil and filter (or every 12 months, whichever occurs first).
0 Lubricate chassis components (or every 12 months, whichever occurs first).
0 Check readfront axle fluid level and add fluid as needed. Check constant
0 For Two-Wheel-Drive vehicles only: Clean and repack the front wheel
0 Rotate tires. See “Tire Inspection and Rotation” in the Index for proper
0 Replace fuel filter.
An Emission Control Service.
(See footnote #.)
velocity joints and axle seals for leaking. (See footnote *‘k.)
bearings (or at each brake relining, whichever occurs first).
rotation pat.tern and additional information. (See footnote
+.)
An Emission Control Service. (See footnote?.)
DATE I
7-30
ProCarManuals.com
Page 404 of 452

I Lono Tripmighway Maintenance Schedule -- Gasoline Engines I
-
,000 Miles (100 000 km) (Continued)
An Emission Control Service.
0 Inspect engine
accessory drive belt.
0 Replace fuel filter. An Em.issiorz Control Service. (See footnote?.)
0 Inspect fuel tank, c.ap and lines for damage or leaks. inspect fuel cap gasket
for any damage. Replace parts as needed.
An Emission Control Service. (See footnote?.)
insulation for damage or looseness. Adjust or replace
as required.
This is a Noise Emission Control Service. Applical?lc) only to vehicles
sold in the United States.
the service manual.
An Emission Control Service. (See footnote?.)
17 Conduct evaporative control system inspection. Check all fuel and vapor lines
and hoses for proper hook-up, routing and condition. Check that the purge
valve works properly, if equipped. Replace as needed.
An Emission Control Sen,ic:e. (See footnote?.)
0 Vehicles With GVWR Above 8,500 lbs. Only: Inspect shields and underhood
0 Conduct Exhaust Gas Recirculation (EGR) system inspection as described in
7-34
ProCarManuals.com
Page 406 of 452

Long Tripmighway Maintenance Schedule -- Gasoline Engines I
82,500 Miles (I37 500 km) DATE I
Change engine oil and filter (or evl_-,r I2 months, whichever occurs first).
An Emission Control Service.
Lubricate chassis components (or every 12 months, whichever occurs first).
(See footnote
#.)
Check rear/front axle fluid level and add fluid as needed. Check constant
velocity joints and axle seals for leaking. (See footnote
*4‘.)
Rotate tires. See “Tire Inspection and Rotation” in the Index for proper
rotation pattern and additional information. (See footnote
+.)
90,000 Miles (150 000 km)
0
0
0
Change engine oil and filter (or every 12 months, whichever occurs first).
An Emission Control Service.
Lubricate chassis components (or every 12 months, whichever occurs first).
(See footnote
#.)
Check redfront axle fluid level and add fluid as needed. Check constant
velocity joints and axle seals for leaking. (See footnote
**.)
For Two-Wheel-Drive vehicles only: Clean and repack the front wheel
bearings (or at each brake relining, whichever occurs first).
Replace fuel filter.
AI? Emissiorz Cnrztrol &r\Vice. (See footnote?.)
I MILEAGE ACTUAL I SERVICEDBY I
DATE I
7-36
ProCarManuals.com
Page 412 of 452

Body Lubrication Service
Lubricate all fuel doors, body hood, body door hinges,
body door hinge
pins, hood latch assembly, pivots,
spring anchor, release pawl, tailgate hinges, and tailgate
handle pivot points, latch bolt, locks and folding seat
hardware. Part
D tells you what to use. More frequent
lubrication may be required when exposed to
a corrosive
environment.
Starter Switch Check
When you are doing this check, the vehicle could
move suddenly.
If it does, you or others could be
injured. Follow the steps below.
3. On automatic transmission vehicles, try to start the
engine
in each gear. The starter should work only in
PARK
(P) or NEUTRAL (N). If the starter works in
any other position, your vehicle needs service.
On manual transmission vehicles, put the shift lever
in NEUTRAL (N), push the clutch down halfway
and try to start the engine. The starter should work
only when the clutch is pushed down all the way
to
the floor. If the starter works when the clutch isn’t
pushed
all the way down, your vehicle needs service.
Brake-Transmission Shift Interlock (BTSI) Check
(Automatic Transmission)
1. Before you start, be sure you have enough room
around the vehicle.
2. Firmly apply both the parking brake (see “Parking
Brake” in the Index
if necessary) and the
regular brake.
NOTE: Do not use the accelerator pedal, and be
ready to
turn off the engine immediately if it starts.
When you are doing this check, the vehicle could
move suddenly. If
it does, you or others could be
injured. Follow the steps below.
I. Before you start, be sure you have enough room
around the vehicle. It should be parked
on a
level surfxe.
7-42
ProCarManuals.com
Page 418 of 452
USAGE
Hood Latch
Assembly, Pivots, Spring
Anchor and
Release Pawl
Hood and Door
Hinges
Body Door
Hinge Pins,
Tailgate Hinge
and Linkage,
Folding Seat and
Fuel Door Hinge
FLUID/LUBRICANT
Lubriplate' Lubricant Aerosol
(GM Part
No. 12346293 or
equivalent)
or lubricant meeting
requirements
of NLGI # 2,
Category LB or GC-LB.
Multi-Pur ose Lubricant,
Superlube
(GM Part
No. 12346241 or equivalent).
Multi-Pur
ose Lubricant,
Superlube
k (GM Part
No. I 234624 1 or equivalent).
~~ ~
USAGE
Tailgate Handle
Pivot Points,
Hinges, Latch
Bolt and Linkage
Weatherstrip
Conditioning Weatherstrip
Squeaks
FLUIDLUBRICANT
Multi-Pur ose Lubricant,
Superlube
kk (GM Part
No. 1234624 I or equivalent).
Dielectric Silicone Grease (GM
Part
No. I2345579 or equivalent).
Multi-Pur ose Lubricant,
Superlube
(GM Part
No. 1234624 I or equivalent).
&
7-48
ProCarManuals.com
Page 425 of 452
Roadside Assistance
GMC’s Roadside Assistance provides stranded owners
with over-the-phone roadside repairs, location
of the
nearest GMC dealer or the following special services:
FlLu Tire CI.rcr/zge: Installation of spare tire will be
covered at no charge (customer is responsible for repair
or replacement
of tire).
Fw/ De/iver2\?: Delivery of enough fuel for the customer
to get to the nearest service station
(up to $4.00) will
be covered.
Jwnp Stcrrt: No-start situations which require a battery
jump start
will be covered at no charge.
Lock Out: Replacement keys or locksmith service will
be covered at no charge
if you are unable to gain entry
into your vehicle. Delivery
of the replacement key will
be covered at no charge within
10 miles ( 14 km).
E17zerpmy 7hvi1zg Senlice: Towing to the nearest
GMC dealer for warranty related disablements will
be covered.
ProCarManuals.com
Page 438 of 452
I
Gages Engine Coolant Temperature
............. 88 . ... %6g
Engine Oil Pressure ................... .' i! , . . %72
!&q5
Speedometer ...................... .- . ......... 2-SF;;i.
Fuel ..............................*.* L.laui
ProCarManuals.com