Throttle Body Spacer for GMC Suburban (1992-1995) 5.7L

Billet Intake Throttle Body Spacer for 1992-1995 GMC Suburban

What it Does: Increases intake plenum volume and optimizes incoming air velocity between the Throttle Body Injection (TBI) unit and intake manifold to improve throttle response and off-idle torque.

The Stock Suburban Plenum Restriction

The factory TBI configuration on GMT400 platform Suburbans positions dual injectors directly over the throttle bores, delivering fuel into an abrupt, shallow intake plenum transition. Under low-RPM towing loads and tip-in acceleration, this restricted entry induces localized charge turbulence and fuel pooling. This dampens manifold vacuum signal recovery, causing sluggish off-idle throttle response and uneven air-fuel distribution across the intake runners.

The Engineering Solution

CNC-machined from 6061-T6 billet aluminum, this spacer extends runner length and expands plenum volume directly beneath the TBI baseplate. The bore design accelerates boundary-layer airflow to promote finer fuel atomization before entering the manifold runners. Finished in a corrosion-resistant anodized coating, the rigid aluminum spacer resists warping and intake vacuum leaks across high thermal cycles.

Technical Specifications

Compatibility

• 1992-1995 GMC C1500 Suburban 5.7L V8 (LO5)
• 1992-1995 GMC K1500 Suburban 5.7L V8 (LO5)
• 1992-1995 GMC C2500 Suburban 5.7L V8 (LO5)
• 1992-1995 GMC K2500 Suburban 5.7L V8 (LO5)

The GMC Workhorse Caliber

Engineered for heavy GMT400 utility, this mechanical spacer supports immediate off-idle torque delivery required for towing and hauling, without requiring ECU recalibration.