1990 GMC K1500 Expansion Tank Cap

Part Number: 4021-09149844

Notes: OE Type Radiator Cap -- 0 psi Pressure Rating

Part Number: 4021-05066134

Notes: OE Type Reservoir Cap

Part Number: 4021-05371340

Notes: Engine Coolant Reservoir Cap -- Screw On Cap; Without Vented Cap

Features:

• Directly replaces a cracked or lost original cap
• Application specific - made to match dimensions of reservoir cap on only certain vehicle years, makes and models
• Seamless fit - reverse-engineered from the original equipment to fit perfectly
• Excellent value - a quick, easy replacement that's less expensive than going back to the dealership

Part Number: 4021-05942339

Notes: Engine Coolant Reservoir Cap -- With Turning Ears

Features:

• Directly replaces a cracked or lost original cap
• Application specific - made to match dimensions of reservoir cap on only certain vehicle years, makes and models
• Seamless fit - reverse-engineered from the original equipment to fit perfectly
• Excellent value - a quick, easy replacement that's less expensive than going back to the dealership

Part Number: 4021-05371348

Notes: Engine Coolant Reservoir Cap -- With Vented Cap; Snap On Cap

Features:

• Directly replaces a cracked or lost original cap
• Application specific - made to match dimensions of reservoir cap on only certain vehicle years, makes and models
• Seamless fit - reverse-engineered from the original equipment to fit perfectly
• Excellent value - a quick, easy replacement that's less expensive than going back to the dealership

Part Number: W0133-1819541

Notes: w/ OEM #15989074 (Orange Letters) (Use together w/ 15650373 Reservoir)

Features:

• Save time, money and labor by replacing only the Cap - instead of the entire Engine Coolant Recovery Tank
• Direct replacement for a proper fit every time
• A necessary safety item - prevents coolant from splashing and/or leaking
• Available in diverse styles, including screw-on and snap-on

Part Number: 4021-09079030

Notes: Standard -- Relief pressure N/A

Features:

• Easy installation and removal
• Maintains proper cooling system pressure
• Meets all OEM specifications
• 100% tested to ensure proper pressure and longevity

Part Number: 4021-07330895

Notes: GM Original Equipment -- New

Part Number: 4021-05713551

Notes: GM Original Equipment -- New; USE TOGETHER WITH 15650373 RESERVOIR. REPLACES GREEN LETTERS.; ORANGE LETTERING

Part Number: W0133-1983812

Notes: w/ OEM #15630112

Part Number: W0133-1983812

Notes: OE Type - w/ OEM #15630112

Part Number: 4021-05415046

Notes: GM Original Equipment -- New