For the 2007 Chevrolet Silverado 1500, the low-beam headlight uses an H11 bulb, while the high beam uses a 9005. The supplied fitment data does not identify a projector or non-projector headlight variation, so confirm the original bulb before ordering if your truck has a different headlamp assembly.
The fog lights use 5202 LED bulbs, and the daytime running lights use H11 LED. Front turn signals and parking lights both use 4157NA, while the front side marker uses 194NA. At the rear, the brake and tail lights use 3047R, and the rear turn signal uses 3047.
Reverse-light fitment requires comparison with the bulb currently installed: it may be 3047 (Option 1) or 921 (Option 2). The center stop light uses 921. Other useful replacements include 194 for the license plate and glove box, 212-2 for the dome and map lights, 912 for the trunk, and 93 for the engine compartment.