Is the upstream for 2003 chevy silverado 1500 5.3 the same part # as the downstream?

they are diffrent in design yes the 2 upstream are bank 1 sensor 1 & 2 downstream are bank 2 sensor 1 & 2

I've seen this described as a "male connector".. but isn't that a female? It looks like something goes IN the white part??

No this is consider a male connector.

Does it have the connector already on the wires?

Yes. The plug is already spliced in just like a factory unit. Completely plug and play install.

I have a 03 silverado. i wanna replace all 4 o2 sensors. guy at autozone said i need 3 of this part number and the center ones different?

My 05 5.3 Silverado called for all four of them to be this part number. I installed them and everything has worked perfectly since!

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15284 Premium OE Fitment Oxygen Sensor - Compatible with Select Cadillac Escalade; Chevrolet Avalanche, Silverado, Suburban, Tahoe, Trailblazer EXT; GMC Envoy, Sierra, Yukon, + More

Product ID: 4047778

Details

Brand
Bosch
Item Weight
0.15 Pounds
Item dimensions L x W x H
2.2 x 1.97 x
Material
Stainless
Style
Oxygen Sensor

🔌True direct-fit OE connectors

⏱️2-second fast-acting heater response

⚙️Double laser-welded stainless steel body

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Description

🚗 Upgrade your ride with Bosch precision – because your engine deserves the best!

RAPID HEAT UP TECHNOLOGY - Heats up within 2 seconds for instant, optimal sensor accuracy.
ECO FRIENDLY ENGINE OPTIMIZATION - Maintains engine health while reducing harmful CO2 emissions.
SEAMLESS PLUG PLAY INSTALLATION - Pre-coated threads and OE connectors make upgrades effortless.
PRECISION ENGINEERED FOR LONGEVITY - Decades of Bosch innovation ensure unmatched durability and performance.
RIGOROUSLY TESTED QUALITY ASSURANCE - 100% factory-tested for flawless functionality and reliability.

The BOSCH 15284 Premium OE Fitment Oxygen Sensor delivers industry-leading durability with a double laser-welded stainless steel body and rapid 2-second heater activation. Factory-tested for flawless performance, it features true direct-fit OE connectors and pre-coated threads for hassle-free installation. Compatible with select Cadillac, Chevrolet, GMC, and Isuzu models, this sensor optimizes engine efficiency, reduces emissions, and extends sensor life—making it the smart choice for professional-grade vehicle maintenance.

Specifications

ASIN	B000CF3VVS
Best Sellers Rank	#39,531 in Automotive ( See Top 100 in Automotive ) #46 in Automotive Replacement Oxygen Sensors
Brand Name	Bosch
Customer Reviews	4.6 4.6 out of 5 stars (542)
Global Trade Identification Number	00028851152846
Included Components	Oxygen Sensor
Item Dimensions	2.2 x 1.97 x 5.83 inches
Item Type Name	Oxygen Sensor
Item Weight	0.15 Pounds
Manufacturer	BOSCH
Material Type	Stainless Steel
Maximum Supply Voltage	5 Volts
Measurement Accuracy	High Accuracy
Measuring Range	4.5 - 5.5 V
Model	F00HL00111
Mounting Type	Flange Mount
Output Type	NPN
Part Number	15284
Response Time	2 seconds
Specific Uses For Product	Temperature
Style Name	Oxygen Sensor
UPC	028851152846
Unit Count	1.0 Count

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$60.95

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Sold byAmazon British Virgin IslandsDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

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