1994 GMC Jimmy Owner's Manual - Page 123

The brake system warning light will also come on when set your you parking brake, andit will stay on if your parking brake doesn't release fully. If it stays on after your parking brake fully released, it means you have a is brake problem. Anti-Lock Brake System Warning Light Standard Cluster Digital Cluster ANTI LOCK With anti-lock, this light will go on when you start your engine and may stay onfor several seconds. That's normal. the light doesn't come on, If have it fixed so it will be ready to warn you if there is a problem. If the light stays on, or comes on when you're driving, your vehicle needs service. If the regular brake system warning light isn't on, you still have brakes, but you don'thave anti-lock brakes. If the regular brake system warning lightis also on, you don't have anti-lock brakes and there's a problem with your regular brakes.See "Brake System Warning Light" earlier in this part. 2-69