Chevrolet K20 Problems
The Chevrolet K20 looked like a very muscular and powerful 4-wheel-drive automobile since its introduction in the 1960s. It was equipped with sturdy car components from the interior to the exterior, and its engine performance was also deemed to be satisfying among its drivers. However, all tough-looking automobiles still have even slight weaknesses in them. The Chevrolet K20 is not an exception to this fact. The following are some of the common problems found in this pickup truck:
Reported problems with the service brakes of the Chevrolet Express 3500 included improperly positioned brake pedal push rod retainers. Now, every component in the braking system is vital. Damages or defects in these parts could cause accidents or collisions. When these rod retainers fail, the stop lamp switch and the brake booster push rod might disconnect from the brake pedal. Consequently, loss of brake operation would be apparent. A recall was done to correct this defect. Express 3500 vehicles were inspected, and the rod retainers were fixed in such cases when they were in the wrong position.
The gasket in the oil filter of the Chevrolet Express 3500 tend to become supple over time especially under high temperature and extreme pressure. Because of this defect, engine oil might seep out. It is very dangerous, since this leak could result into a fire. As a response to this concern by Express 3500 owners, Chevrolet recalled the affected vehicles to replace the defective oil filters. This recall happened sometime in 2007.
It was discovered that the bolts attaching the seat recliner to the seat frame had a tendency to become loose or fractured. As a result, this damage could make the seat recline all of a sudden. It may seem like a funny scenario; but if it happens on the driver's seat while the car is running, it could mean a serious accident. Chevrolet recalled the damaged vehicles. Washers were installed between the seat recliner and seat frame, and new retaining bolts were torqued to a higher specification. All the fabric and foam, which were located between the recliner assembly and the seat frame, were taken out as well.
Chevrolet K20 Pickup: Maintenance Procedures to Perform at Certain Mileage
The Chevrolet C/K line of pickup truck, where the K20 is included, was manufactured from 1960 to 2002. So if you own a K20, chances are it's been with you for more than a decade now or you've bought a used one. If that's the case, you need more elbow grease to keep it working well particularly if you use it as a workhorse. It pays big time to know the maintenance procedures your truck requires particularly if it has more than 75,000 miles on it. If you've bought a used K20, don't forget to ask the previous owner about the truck's mileage so you'll know where to start with your maintenance.
Check the entire brake assembly from brake pads, calipers, rotors and drumsto the brake lines and hoses. Replace any brake component that has worn beyond the minimum thickness required. Also inspect your parking brake system and do the necessary service. After 100k mileage, it is also recommended to inspect the cooling system and its hoses for leaks and other signs of damage that may lead to engine overheating. Also pay attention to the wheel ends especially if you've been noticing end play and noise. The cabin air filter, if your truck is fitted with one, should also be replaced.
Besides the brake system that necessitates regular servicing, you need to replace your truck's fuel and air filters at 90,000 miles. You also need a complete exhaust system and heat shield inspection and deal with any signs of damage. If your truck is fitted with automatic transmission, now is the time to change the transmission fluid too. Also take time to check and lubricate the ball joints, steering linkage, half shafts, u-joints, drive shaft, and suspension. It is a good idea to stick to the type of lubricant recommended by your truck's manufacturer. The cooling system and the wheel ends should also be rechecked this time.
At this mileage, you can forego some of the checks that you've done when you've reached 90,000 miles, save for the brake and cooling system checks as well as suspension checks and lubrication. If you haven't done coolant change when you've got 100k miles, don't pass up on that this time around. You may also need to replace your spark plugs and accessory drive belts. Lubrication of the suspension components shouldn't be neglected as well.
The checks and maintenance services you should conduct at 120,000 miles are basically just a repeat of what you've done at 90k miles. You should prepare for the cost of some part replacement as your truck is already 30,000 miles older since your last thorough check, so chances are, some of its components have worn out to a point when replacement is necessary.
Aside from the maintenance procedures you've done when you achieved 120,000 miles, you have to add PVC (if your truck is equipped with one) check and accessory drive belt replacement (if you haven't replaced it after 100k miles) during your 150k miles maintenance. All the fluid filters should be replaced this time. The transfer case fluid and the front axle lubricant of your K20 should also be replaced. All your truck's important systems—brakes, suspension, cooling, engine, and transmission—should be checked thoroughly as well. Replace all the components that call for replacement.