Standard features included air conditioning with tri-zone climate controls, an adjustable, leather-wrapped steering wheel with radio controls, cruise control, leather upholstery, heated front, and rear seats, 8-way power front seats, dual memory system, BOSE premium sound system, single-CD/cassette player and later in 2004, a six-disc CD changer, then in 2007, a single CD-player with MP3 capability, an auxiliary input jack and DVD player, outside-temperature indicator, compass, rear radio controls, independent front torsion bar suspension, rear five-link coil spring suspension developed for the H2, oversized tires with wheels scripted "HUMMER", universal garage door opener and remote engine start (2007 and 2009).

Options for the H2 include adjustable rear suspension (which is included within the Adventure Package), a broad power sunroof, rearview camera, DVD entertainment system, navigation system, ladder, custom grilles, side step bars, Air compressor with road assistance kit, and 20" chrome wheels (slightly different from stock wheels).

This included a new instrument cluster with improved gauges and Driver Information Center (DIC) based on the higher-trim GMT900 trucks/SUVs, a new leather-wrapped steering wheel, three new radios with a Bose premium audio system and auxiliary audio inputs (including a new touchscreen GPS navigation radio with DVD audio and video playback while the transmission is in the park position, and XM Nav-Traffic capabilities), a new rear seat DVD entertainment system, Bluetooth hands-free calling capabilities, enhanced voice activation, new OnStar hardware with buttons moved from the rearview mirror to the overhead console, a lower dashboard-mounted radio, new dual-zone climate controls, new rear seat audio system controls, a new dash-mounted control knob for the 4X4 system to replace the old pushbutton controls, brushed aluminum interior trim panels, new interior color options, available remote engine start, and a center dashboard-mounted analog clock.

Hummer launched a special 2009 Black Chrome Limited Edition featuring a new paint color, Sedona Metallic.

[9][10] Prior to 2011, the United States Environmental Protection Agency (EPA) exempted vehicles with a GVWR over 8,500 lb (3,900 kg) from fuel economy standards and testing.