FAQs—Chevrolet K30 Pickup
I own a Chevrolet K30 Pickup for 20 years now, and just recently, I've been having a problem with my truck's heater. I tried to inspect what's wrong with my vehicle's HVAC system, and found out that my heater core has failed. I've already purchased an original equipment manufacturer (OEM) heater core online, but I don't know how to replace it. I'm afraid I might mess something up. What should I do?
If your truck's heater core has failed, it is important to replace it immediately especially if you drive during the winter season. It would be impossible for you to bring your vehicle with a failed heater core. Replacing it is easy. First, you need to drain the radiator and remove the heater hoses from the core tubes. You need to plug the core tubes to prevent spillage. Disassemble the failed heater core and remove the bolts. Finally, replace the core and tighten the bolts. When you're done, try turning on your heater. If it still won't work, then bring your vehicle to the repair shop so that an expert mechanic can install your heater core properly. They might also need to check if the core is indeed causing the problem or there are other reasons why your heater won't work.
I've been having rough idling problems with my Chevrolet K30 Pickup. It runs great when driving and smooth when coming to a stop. However, lately, I noticed that there is a pronounced stumble every time I step on the brakes. I'm sure that it is not a problem with my ignition, since the distributor, cap, plugs, wires, and coils are all new. My oxygen sensor is also newly replaced. There were also no vacuum leaks when I checked the intake. Still, I've been suffering from a rough ride. What did I miss?
It's great that you took the time to ensure that all your vehicle's components are in good condition.It's also nice that you made the effort to do a thorough and logical examination of your vehicle. However, the rough idle problem could be determined through the oxygen sensor. Check the voltage using an oscilloscope to check the changes in pattern. The voltage should cross between low to high. If your EGR is causing a vacuum leak, then the voltage will be set at low. You might also check if the fuel injectors are already worn out. Rev up the engine and check how the throttle body sprays at idle. If there is a problem with the injectors, replace them immediately and see if you will get rid of the rough idling.
My truck just started to blow the fuse for the transfer case engagement. I wonder if the transfer case actuator may be sticking or shorting out the circuit. What should I do?
You need to remove the transfer case shields and the wirings from the motor. Remove the bolts as well, and install three bolts to the transfer case actuator. Make sure to tighten it by 37 Nm and that they are all aligned. After that, reinstall the transfer case wiring and the shields.