DASPARTS Engine Oil Dipstick Tube for 1999–2008 Cadillac Chevrolet GMC Hummer — OE 12563918/917-303 Fit, Durable Metal

High-quality replacement engine oil dipstick tube designed to match OE fitment for select 1999–2008 Cadillac, Chevrolet, GMC and Hummer vehicles (OE refs 12563918, 917-303).

This DASPARTS dipstick tube is crafted to restore proper oil level access and routing when an original tube is bent, cracked, or missing. Manufactured to align with factory mounting points and oil-fill clearances, it helps ensure accurate oil level readings and prevents leaks or oil spray onto adjacent engine components. Compatible vehicle families include several late‑model Cadillac Escalade, Chevrolet Avalanche, and related GMC/Hummer platforms from the model years listed.

Will this dipstick tube fit my specific vehicle?

Check the part references and your vehicle's year, make, and model to confirm compatibility. This tube is made to meet the same dimensions and attachment points as OE 12563918 and 917-303 and is intended for the listed 1999–2008 Cadillac, Chevrolet, GMC and Hummer applications.

• Compatible with select 1999–2008 Cadillac, Chevrolet, GMC, Hummer models
• Direct replacement for OE part numbers 12563918 and 917-303
• Recommended verification: compare mounting tabs and overall bend to your existing tube

How does this replacement tube affect oil level readings?

A correctly shaped and seated dipstick tube ensures the dipstick seats fully and reaches the factory oil sump position, allowing consistent and reliable oil level readings. Using a tube with proper fit prevents false low or high readings caused by bent tubes or improper insertion angles.

• Restores correct dipstick travel and seating depth
• Prevents oil misdirection that can skew measurements
• Helps maintain a clean, unobstructed dipstick path for easy checks

What materials and construction should I expect?

DASPARTS supplies dipstick tubes made from metal engineered for heat resistance and durability in the engine bay. The tube is formed to match factory bends and includes mounting features compatible with original brackets to reduce vibration and chafing.

• Durable metal construction suited for engine temperatures
• Factory-style bends and mounting tab locations
• Finish that resists corrosion under normal operating conditions

How easy is installation for a DIYer or technician?

Installation is straightforward for anyone comfortable with basic under-hood tasks: remove the old tube, align the new tube to original mounting points, and secure it with factory hardware. Minimal tools are required and most installations can be completed without removing major components.

• Simple swap-in procedure using existing fasteners and brackets
• No special tools required—basic hand tools suffice
• Typical installation time: under an hour for experienced DIYers

Who is this for: Owners, mechanics, and restoration shops replacing a damaged or missing dipstick tube on compatible Cadillac Escalade, Chevrolet Avalanche, and related GMC or Hummer models built between 1999 and 2008. It’s also suitable for fleet or repair facilities seeking an economical, OE-referenced replacement part to restore proper oil-check function and prevent engine-bay oil contamination.