Buy Chevrolet Suburban 1500 Fuel Injection Throttle Bodys

The fuel-injection throttle body on a Chevrolet Suburban 1500-sometimes called the throttle valve, air-intake valve, butterfly valve, or throttle assembly-controls how much air flows into the V-8 engine. When you press the gas pedal, an electronic motor inside the throttle body swings a flat "butterfly" plate open so the engine can breathe and get more fuel. A healthy throttle body gives smooth idle, strong acceleration, and good gas mileage, while a dirty or faulty one can trigger "Reduced Engine Power" warnings, rough idle, or stalling.

Modern Suburban 1500 models use Electronic Throttle Control (ETC), also known as drive-by-wire. Instead of a cable, two pedal sensors tell the engine computer (ECM) how far you're pressing; the ECM then commands a small motor on the throttle body to open the plate to the right angle. Learn more about ETC .

• The throttle body sits between the air filter box and the intake manifold (Wikipedia).
• Built-in position sensors (TPS) report plate angle; mismatched signals set codes like P0121 or P2135 (Edmunds, Kbb.com).

• Rough idle or stalling - carbon on the throttle plate keeps it from closing evenly (Silverado Sierra).
• "Reduced Engine Power" message - ECM limits power if it sees inconsistent TPS signals (codes P0121, P2135, P2173) (Edmunds, Kbb.com, Kbb.com).
• High or hunting idle after battery change - the plate needs an idle-learn procedure (YouTube).
• Poor MPG & hesitation - dirt on the blade disrupts airflow, skewing fuel trim (YouTube).

1. Scan for OBD-II codes.
   P0121 means TPS "A" signal out of range (Edmunds).
   P2135 means TPS A/B signals don't match (Kbb.com).
2. Watch live data. Pedal % and throttle % should rise smoothly together.
3. Check wiring & grounds. Loose ground can mimic sensor failure (Reddit).
4. Look for vacuum leaks around the intake gasket if the idle is high.

A basic cleaning can restore idle and save money.

• Remove the air-intake tube, unplug the connector, and spray throttle-body cleaner on the plate edges. A soft toothbrush loosens deposits (step-by-step video) (YouTube).
• Do not pry the butterfly open by hand on drive-by-wire units; have a helper hold the pedal with the key "ON" (YouTube).
• Re-attach everything and perform an idle relearn: let the engine idle for three minutes, turn off 60 sec, then idle again or use a scan tool (relearn demo) .

If sensors are bad or the motor sticks, replacement is straightforward:

1. Disconnect battery.
2. Unbolt four 10 mm bolts.
3. Swap the gasket.
4. Torque bolts to 89 in-lb (10 N·m) on aluminum intake manifolds (Silverado Sierra).
5. Re-connect and complete the idle relearn.

The electronic throttle body (ETB) part # 12679524 fits 2007-2014 Suburban 1500 with 5.3 L or 6.0 L V-8 (flex-fuel and gas), plus related Tahoe/Yukon models (newgmparts.com, autopartsprime.com). Earlier 2000-2002 Suburbans used a cable-driven unit with throttle-body-injection (TBI); 2003-2006 switched to ETC but need the 78 mm plate style. Always match the VIN eighth digit to confirm fit.

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GM issued Customer Satisfaction Program 11273B covering certain 2007-2013 trucks/SUVs for throttle-body-related "Reduced Engine Power"-free repair up to 10 years/120 k mi (JustAnswer). While not a formal NHTSA recall, technicians flash the ECM or replace the ETB. Always check your VIN at the official NHTSA site or with a GM dealer. Kelley Blue Book keeps an up-to-date list of Suburban 1500 recalls (KBB recall page) .

Keeping the throttle body-your engine's air gate-clean and in good working order prevents rough idle, saves fuel, and avoids annoying limp-mode warnings. For 2007-2014 Chevrolet Suburban 1500 models, part # 12679524 is the direct electronic replacement. Use the correct torque, perform an idle relearn, and your big SUV will breathe easy for miles to come.