FAQs—Chevrolet V1500 Suburban
Something is wrong with my power door locks. Each time I press all locks down, the back locks won't lock. I have to manually lock the doors, and this is really inconvenient. Why does it happen? Any suggestions on solving it?
The culprit could be power door lock actuators that are no longer fully functioning. When it happens, the actuators cannot rotate the gear mechanism that pushes or pulls a linkage to lock or unlock your power doors. If you heard a strange sound from the door while operating the lock, then it is a sure sign that a power door actuator is faulty already and needs to be replaced. The entire lock assembly may need to be replaced on newer Suburbans to remedy the door lock actuator problem.
The speedometer on my Chevrolet V1500 Suburban began to work intermittently last week then failed entirely just yesterday. How do I fix it?
Erratic speedometer operation is common among vehicles manufactured by General Motors, and your Chevy is no exception. The instrument cluster must be removed and be taken to a repair shop to have all its stepper motors replaced. Then mount back the instrument cluster. That should correct your speedometer issue.
However, if your vehicle is an older model, you may want to check the speedometer cable that joins the speedometer and the transmission, as worn cable is a frequent cause of speedometer problems. If this is the case, then the cable has to be replaced.
My oil pressure gauge seems to act weird. Last week, it registered a high oil pressure reading, then it dropped to zero. It went up to 80 and then dropped again to zero each time I accelerated. There are also rattling noises. What have gone wrong?
This could be a sign of oil pressure switch failure. Check this switch for any leak around where the metal meets the plastic on either end. You have to change the switch if it is leaking. This DIY task involves a few steps. First, remove the main feed wire and then the old oil pressure switch, which you can find at the rear engine. Then install the new unit and tighten it. Put back the main feed wire, and that's it. To check if you did the installation right, start up the engine and see if there is any leak from the new oil pressure switch. If there's no leak, then great! Your job is done.
Something seems wrong with my air-conditioning system. On the driver's side, the A/C blows warm air while the on the passenger's side, cold air blows. I tried switching off the A/C and restarted my Suburban. It worked but just temporarily. What could be a long-term solution?
The incorrect A/C temperature or air delivery may be caused by failure of one or more heater and air conditioning air delivery, the temperature mode door actuator, or both. Check the fault codes on the HVAC control module and have the mode door actuator fixed by a qualified technician.