3PCS 15328865 12V 40A 5-Pin SPDT Micro ISO Relay Compatible with Chevrolet/GMC/Cadillac/Buick Cooling Fan & A/C Fuse-Box - Replaces 13503103 12193602 12177234 19115298 19116363 21997408

What it is: 15328865 12V 40A 5-pin SPDT micro ISO relay for under-hood fuse/relay boxes. Used by many GM platforms to switch high-current loads.Primary function: Controls circuits such as radiator cooling fan or A/C compressor clutch (varies by vehicle/trim). Replacing a weak relay restores stable cooling and A/C operation.Key specifications: 12V DC coil; 5 blade terminals; micro ISO footprint; SPDT (changeover) contact; plug-in design.Cross-reference OE numbers: 15328865 (fan control), superseded to 13503103; also seen as 12193602, 12177234, 19115298, 19116363, 21997408 (application-dependent; confirm before ordering).Install location: Engine bay fuse/relay block. Match the keyed footprint and pin layout to your original relay and seat fully.Compatibility guidance: Use the OE part number on your original relay or your VIN-based parts catalog to confirm fit. This relay family is used across many Compatible with Chevrolet/GMC/Cadillac/Buick models and years.Service tip: If the old relay shows heat damage, inspect the socket and replace any melted connector terminals. Check related fuses for overcurrent events.Backed by catalog data showing 15328865 as a GM fan-control relay later replaced by 13503103; interchange listings link these OE numbers across A/C and cooling-fan relay applications.

• Specs & OE cross-refs — 12V DC, 40A, 5-pin SPDT micro ISO (blade) relay for under-hood fuse/relay boxes. Cross-references (match by OE to confirm): 15328865 (fan control), supersession 13503103, plus 12193602, 12177234, 19115298, 19116363, 21997408 (varies by circuit/trim). Plug-in replacement; verify your cavity layout & pin count before install.
• Install location & fixes — Typically in the engine compartment fuse/relay block. Controls high-load circuits such as cooling fan or A/C clutch (varies by vehicle). Replacing a failing relay can restore inoperative A/C cooling, intermittent fan operation, or other relay-controlled loads. Always compare the keyed footprint to your original relay before seating.
• Verified North America fitment examples (by year/model/location) — Compatible with 2010 Chevrolet Silverado 1500 [A/C Compressor] Relay, 2006 Cadillac Escalade [Radiator Fan] Relay, 1996 Chevrolet G30 [A/C Compressor] Relay, 1993 Chevrolet C1500 Pickup [A/C System] Relay, 2007 GMC Sierra 2500 Classic [A/C System] Relay — when the vehicle specifies OE 15328865/13503103 in that cavity. (Match by OE/VIN for your exact trim.)
• Compatibility scope — Multi-purpose micro ISO relay used across many Compatible with GM platforms (Chevrolet/GMC/Cadillac/Buick) and years. Because usage varies by trim, the most reliable check is the OE number on your original relay and your VIN-based parts catalog; 15328865 was later superseded to 13503103.
• Complementary items & service tip — Pair with a compatible relay connector/pigtail if your socket is heat-damaged, and inspect related A/C clutch or cooling-fan fuses during service to prevent repeat failures. (Example: A/C relay connector listings for Compatible with GMC Sierra/Silverado platforms.)