Throttle Body Assembly 12595276 for Chevrolet Express Silverado GMC Sierra Safari Yukon 1999-2007

Throttle Body Assembly 12595276 for Chevrolet Express Silverado GMC Sierra Safari Yukon 1999-2007

This throttle body controls airflow into the intake manifold for Chevrolet Express Silverado GMC Sierra Safari Yukon. It responds to the accelerator pedal position sensor and regulates how much air enters the engine. On modern engines, a dirty or worn throttle body is one of the most common causes of idle problems and drivability complaints.

Vehicle Compatibility

Replaces OEM Part Numbers

88894295 • 17113650 • 12595276 • Application • following • models • 2003-2005 • Cadillac • Escalade • 2001-2005 • Chevrolet • Astro

Signs You Need a Replacement

If your equipment is showing any of these symptoms, the throttle body may be the cause:

• Rough or surging idle — RPM bounces between 500 and 1500 at a stoplight
• Check engine light — common codes: P0121, P1545, P0220
• Reduced power or limp mode — ECU limits throttle when it detects a fault
• Poor cold start — long crank and hesitation in cold weather
• Unresponsive throttle — dead spot when you press the gas pedal
• Higher fuel consumption — ECU over-fuels because it can’t meter air correctly

Post-Installation Adaptation

After installing a new throttle body, run a throttle adaptation so the ECU learns the new zero and full-throttle positions. With VCDS: go to Engine, Basic Settings, Group 060 (or 098 on some models). Without a scanner: key ON for 30 seconds, OFF for 10 seconds, then start and idle for 2 to 3 minutes without touching the gas. Skip this and the car will idle poorly.

Frequently Asked Questions

Which Chevrolet models does this part fit?
Refer to the Vehicle Compatibility table above for the full list of Chevrolet models. Each listing includes the body type, engine, and production years. Match your vehicle’s engine code (stamped on the engine block) against the listed codes to confirm.

Can I cross-reference 88894295 with 17113650?
Yes. Both 88894295 and 17113650 are interchangeable OEM numbers for this part. They refer to the same component with the same specifications, just different part number revisions. This replacement fits all applications listed for either number.

My vehicle is a 1999 model — is it covered?
The compatibility range for this part includes 1999-2007. The 1999 model year falls within this range, but you should still verify the engine code and body type match. Mid-year production changes sometimes mean two vehicles from the same model year use different parts.

Do I need to do a throttle adaptation after installing this?
Yes. After installing the new throttle body, run a throttle adaptation (basic setting) so the ECU learns the new zero and full-throttle positions. With VCDS: Engine, Basic Settings, Group 060 or 098. Without a diagnostic tool: key ON for 30 seconds, OFF for 10 seconds, then start and let it idle for 2 to 3 minutes without touching the gas pedal.

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