GM Parts Club
Memorial Day is the unofficial start of trailer season, and a lot of trailers have been sitting since Labor Day. Here is what to actually look at, using a 2019-2024 Cadillac XT4 as the example.
Brakes
Watch for a pedal that sits lower than it used to, or sinks slowly at a stoplight. Inspect at every tire rotation. Most GM trucks and SUVs go 30,000 to 60,000 miles on front pads depending on how they are used, and towing cuts that hard.
GM friction material is matched to the specific rotor metallurgy and the ABS calibration on your vehicle.
Cooling System
Watch for a temperature gauge that climbs in traffic and drops back on the highway. GM’s long-life coolant is generally rated for 5 years or 150,000 miles on the first fill and 5 years or 100,000 miles after that. Hoses and the surge tank should be inspected annually once past 80,000 miles.
GM cooling systems are DEX-COOL based and the seal and gasket materials are chosen for that chemistry.
Electrical and Charging
Watch for power windows or seats getting slower over a season. Batteries in Texas heat routinely give up between three and five years. Test annually after year three, before the first cold snap.
Auxiliary and stop-start systems use AGM batteries, and dropping a flooded battery in is a short path to a repeat failure.
The Short Checklist
- Brake pads: Front and rear pads are almost never the same part, and heavy duty, tow and performance brake packages use different calipers and rotors than the base vehicle.
- Radiators: Engine, tow package and rear-A/C content all change the radiator and hose part numbers. Have the VIN ready.
- Batteries: Vehicles with stop-start often use two batteries. Confirm which one you are replacing before ordering.
We are a factory GM dealer, not a reseller, so what you order is the same part the service drive installs. Browse our Cadillac OEM parts catalog or search for XT4 parts.
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