Try a Peterbilt dealership.
On a 2005 Peterbilt 379, the expansion valve is typically located in the HVAC system, specifically within the air conditioning unit or evaporator assembly. It is usually found near the evaporator core, which is situated behind the dashboard or under the hood, depending on the configuration of the truck's air conditioning system. For precise location and access, it's advisable to consult the vehicle's service manual or schematics.
Right side of the vehicle, under the hood, in the HVAC compartment.
A 2005 Peterbilt typically uses R-134a refrigerant in its air conditioning system, which generally holds around 2 to 3 pounds of refrigerant. However, the exact amount can vary depending on the specific model and configuration. It's always best to refer to the owner's manual or a service manual for precise specifications. Regular maintenance and checks can help ensure optimal performance of the AC system.
There are a multitude of possibilities here. You need to have a system performance test done to help narrow the cause down.
In the shop manual.
You cannot download the service manual for a 2005 Pontiac Sunfire for free. You will need to call the manufacturer and purchase a new manual.
A 2005 Peterbilt 379 typically requires about 30 ounces (approximately 2.5 pounds) of R134a refrigerant for the air conditioning system. The high-pressure side should generally be between 200-250 psi, while the low-pressure side should be around 25-45 psi, depending on ambient temperatures. Always refer to the vehicle's service manual for the most accurate specifications.
The diagram for the fuse box in a 2005 Caravan can be found in the service manual. The manual might be available for check out at your local library.
You can get one here. www.tradebit.com/filedetail.php/127825290-1995-2005-hyundai-sonata-repair-service-manual
Get one here. [tradebit.com/filedetail.php/9018747-lincoln-ls-2000-2005-service-repair-manual] You can get repair manual information free at FreeAutoMechanic.com [freeautomechanic.com/repairmanuals.html]
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The flasher unit is integral to the switch.