How much refrigerant does a Chevrolet Suburban / Fullsize Blazer / Tahoe A/C system hold?

The 2018 Chevrolet Suburban / Fullsize Blazer / Tahoe (8 Cyl. 6.2 Eng.) holds 28.8 oz of R-1234yf as a complete system charge. That is the amount for an empty, evacuated system, not for a top-off.

Can I put R-134a in a car that uses R-1234yf?

No. The two use different service fittings on purpose and different oils. Charging the wrong refrigerant can damage the compressor and is illegal in the US under EPA rules.

Can I recharge the A/C myself?

A DIY can with a gauge can top off a slightly low R-134a system. If the system is empty it has a leak, and adding refrigerant without fixing it wastes the can. A full charge needs the system evacuated and weighed in, which is a shop job.

Chevrolet Suburban / Fullsize Blazer / Tahoe A/C refrigerant type and capacity

GarageDex's A/C data shows the 2018 Chevrolet Suburban / Fullsize Blazer / Tahoe (8 Cyl. 6.2 Eng.) uses 28.8 oz of R-1234yf refrigerant with PAG Oil compressor oil. Earlier years used R-134a, so check the year row below.

Shop R-1234yf Match the type on your under-hood decal

Key takeaways

2018 Chevrolet Suburban / Fullsize Blazer / Tahoe: 28.8 oz of R-1234yf, PAG Oil oil.
The charge is a full-system amount; a top-off adds far less.
This model switched refrigerant types over its life (R-1234yf, R-134a) - use your year's row.
A system that is empty has a leak - fix it before charging.

Chevrolet Suburban / Fullsize Blazer / Tahoe A/C refrigerant and oil by year
Years	Engine	Refrigerant	Charge	Compressor oil
2018	8 Cyl. 6.2 Eng.	R-1234yf	28.8 oz	PAG Oil
2017	8 Cyl. 5.3 Eng.	R-1234yf	29.92 oz	PAG Oil
2017	8 Cyl. 6.2 Eng.	R-1234yf	29.92 oz	PAG Oil
2015 to 2016	8 Cyl. 5.3 Eng.	R-1234yf	29.92 oz	PAG Oil
2015 to 2016	8 Cyl. 5.3 Eng.	R-134a	32.48 oz	PAG-46 6.6 oz
2014	8 Cyl. 5.3 Eng.	R-134a	25.6 oz	-
2014	8 Cyl. 5.3 Eng.	R-134a	40 oz	PAG-46 11 oz
2012	8 Cyl. 5.3 Eng. Suburban; w/ Rear AC	R-134a	48 oz	PAG-46 11 oz
2012	8 Cyl. 5.3 Eng. TAHOE; w/o Rear AC	R-134a	26 oz	PAG-46 7.1 oz
2012	8 Cyl. 6.0 Eng. Suburban; w/ Rear AC	R-134a	48 oz	PAG-46 11 oz
2012	8 Cyl. 6.0 Eng. TAHOE; w/o Rear AC	R-134a	26 oz	PAG-46 7.1 oz
2010 to 2011	8 Cyl. 4.8 Eng. TAHOE; HYBRID; w/ Rear AC	R-134a	40 oz	PAG-46 11 oz
2010 to 2011	8 Cyl. 5.3 Eng.; w/ Rear AC	R-134a	48 oz	PAG-46 11 oz
2010 to 2011	8 Cyl. 5.3 Eng.; w/o Rear AC	R-134a	25.6 oz	PAG-46 7.1 oz
2010 to 2011	8 Cyl. 6.0 Eng.; w/ Rear AC	R-134a	48 oz	PAG-46 11 oz
2010 to 2011	8 Cyl. 6.0 Eng.; w/o Rear AC	R-134a	25.6 oz	PAG-46 7.1 oz
2009	8 Cyl. 4.8 Eng. TAHOE; Excl. Hybrid; w/ Rear AC	R-134a	40 oz	PAG-46 11 oz
2009	8 Cyl. 4.8 Eng. TAHOE; Excl. Hybrid; w/o Rear AC	R-134a	25.6 oz	PAG-46 7.1 oz
2009	8 Cyl. 5.3 Eng.; Excl. Hybrid; w/ Rear AC	R-134a	48 oz	PAG-46 11 oz
2009	8 Cyl. 5.3 Eng.; Excl. Hybrid; w/o Rear AC	R-134a	25.6 oz	PAG-46 7.1 oz
2009	8 Cyl. 6.0 Eng.; Excl. Hybrid; w/ Rear AC	R-134a	48 oz	PAG-46 11 oz
2009	8 Cyl. 6.0 Eng.; Excl. Hybrid; w/o Rear AC	R-134a	25.6 oz	PAG-46 7.1 oz
2009	8 Cyl. 6.2 Eng. TAHOE; Excl. Hybrid; w/ Rear AC	R-134a	40 oz	PAG-46 11 oz
2009	8 Cyl. 6.2 Eng. TAHOE; Excl. Hybrid; w/o Rear AC	R-134a	25.6 oz	PAG-46 7.1 oz
2008	Suburban; w/ Rear AC	R-134a	48 oz	PAG-46 11 oz
2008	TAHOE; Excl. Hybrid; w/ Rear AC	R-134a	40 oz	PAG-46 10 oz
2008	All Eng.; Gas/Electric	Decal	See decal	See decal
2007	Suburban; w/ Rear AC	R-134a	48 oz	PAG-46 11 oz
2007	TAHOE; w/o Rear AC	R-134a	25.5 oz	PAG-46 8 oz
2007	TAHOE; w/ Rear AC	R-134a	40 oz	PAG-46 10 oz
2003 to 2006	TAHOE; w/ Rear AC	R-134a	43 oz	PAG-46 11 oz
2003 to 2006	Suburban; w/ Rear AC	R-134a	48 oz	PAG-46 11 oz
2003 to 2006	All Eng.; w/o Rear AC	R-134a	25.5 oz	PAG-46 8 oz
2002	TAHOE; w/ Rear AC	R-134a	42 oz	PAG-46 11 oz
2002	Suburban; w/ Rear AC	R-134a	48 oz	PAG-46 11 oz
2002	All Eng.; w/o Rear AC	R-134a	28 oz	PAG-46 8 oz
2001	Suburban; w/ Rear AC	R-134a	48 oz	PAG-46 11 oz
2001	TAHOE; w/ Rear AC	R-134a	48 oz	PAG-46 11 oz
2001	All Eng.; w/o Rear AC	R-134a	29 oz	PAG-46 8 oz
1996 to 2000	All Eng.; w/ Rear AC	R-134a	64 oz	PAG-46 11 oz
1996 to 2000	All Eng.; w/o Rear AC	R-134a	36 oz	PAG-46 8 oz
1996 to 2000	All Eng.; w/o Rear AC	R-134a	36 oz	PAG-150 8 oz
1996 to 2000	All Eng.; w/ Rear AC	R-134a	64 oz	PAG-150 11 oz
1994 to 1995	All Eng.; w/o Rear AC	R-134a	36 oz	PAG-150 8 oz
1994 to 1995	All Eng.; w/ Rear AC	R-134a	64 oz	PAG-150 11 oz

Recharge supplies for your Chevrolet Suburban / Fullsize Blazer / Tahoe

Buy the refrigerant type shown for your year and confirm it against the under-hood decal. R-1234yf cans cost more and need a matching coupler.

R-1234yfR-1234yf can with a gauge and couplerShop cans Manifold gauge setReads high and low side pressure properlyShop gauges Leak detection kitFind the leak before you spend on refrigerantShop kits

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Source: Four Seasons - Compressor / System Refrigerant & Lubricant Specs. The under-hood A/C decal is the primary source for your exact car - it overrides any table. Charges assume a clean system with a new drier.