GMC 2003 Envoy - Manual (Page 417)

Engine Cooling System Inspection Brake System Inspection
Inspect the hoses and have them r&pEaced If Ihey
□re cracked, sv^/ollen dr deteriofated, In sped
&l\ pipes,
firtÍFigs and damps; replaça as needed. Clean (he
□ulside of Ihe radiatOT and air conditioning cqndansor.
To help ensure proper operalion, a pressure lest oí
the cooling system and pressune cap is recommended
at least once a year.
Transfer Case and Front Axle
{Four-Wheel Drive) Inspection
Every 1 2 me nibs or at engine oil change intervals, check
front an le and transfer case and add lubricant when
necessary.
A Iluid less could indicate a problem; check
and have it repaired, it needed- Check vent hose at
transfer case (or kmks and proper installation. More
frequent lubrication nr>ay be required on off-road use.
Inspect ibG complete syalem. Inspect brake lines and
hoses for proper hook-up. binding, leaks, cracks,
chafing, etc. inspect disc brake pads for wear and rotors
(or surface condition Inspect other brake parts,
inciudmg calipars, parking brake, etc. Check parking
brake adjustment. Vou may need to have ycur brakes
inspected more often if your driving habits or
conditions result in frequent braking.
6’ie